The MEL contains units and systems that may be inoperative or missing on the aircraft for a period specified by the MEL Category, without reducing the safety of the aircraft’s operation. The main purpose of the list is to minimize passenger discomfort due to service delays, reduce engineering costs, and improve aircraft utilization. This list is typically applicable at all transit stations where equipment and time are insufficient for rectifying defects, as well as at the base.

BOEING 737 MAX (B-737-7/-8/-8200/-9) MEL

ATA 21

  • 21-21-01 Ground Conditioned Air Connector Check Valve
    • 21-21-01A Valve Closed
    • 21-21-01B Valve Open
  • 21-22-01 Flight Deck Foot Heater Systems
  • 21-23-01 Return Air Grille
  • 21-25-01 Recirculation Fans
    • 21-25-01-01 Left Fan
    • 21-25-01-02 Right Fan
  • 21-27-01 Equipment Cooling Supply and Exhaust Fans
  • 21-27-02 Overboard Exhaust Valve
    • 21-27-02A Valve in SMOKE Position
    • 21-27-02B Valve Fully Open
  • 21-27-03 Equipment Cooling Low Flow Detector Systems
  • 21-27-04 Equipment Cooling Air Filter
  • 21-27-05 Enhanced E6 Rack Equipment Cooling Exhaust Fan
  • 21-31-01 Cabin Pressure Control Systems
    • 21-31-01-01 Automatic Mode
      • 21-31-01-01A One Inoperative
      • 21-31-01-01B Both Inoperative
    • 21-31-01-02 Manual Mode
  • 21-31-02 Main Outflow Valve
    • 21-31-02-01 Automatic Mode Electronic Actuators/Motors
  • 21-32-01 Positive Pressure Relief Valves
    • 21-32-01A Valve Closed
    • 21-32-01B Valve Open – Unpressurized Flight
  • 21-33-01 Cabin Rate of Climb Indicator
    • 21-33-01-01 Pressurized Flight
    • 21-33-01-02 Unpressurized Flight
  • 21-33-02 Cabin Differential Pressure Indication
    • 21-33-02-01 Cabin Altitude Indication Operative
    • 21-33-02-02 Unpressurized Flight
  • 21-33-03 Cabin Altitude Indication
    • 21-33-03-01 Cabin Differential Pressure Indication Operative
    • 21-33-03-02 Unpressurized Flight
  • 21-33-04 Cabin Altitude Warning System
    • 21-33-04-01 CABIN ALTITUDE Light
    • 21-33-04-02 High Altitude Warning System
  • 21-33-05 Outflow Valve Position Indicator
  • 21-45-01 Door Area Heater Systems
  • 21-51-01 Air Conditioning Packs
    • 21-51-01-01 Air Conditioning Packs (737-8/-8200/-9)
      • 21-51-01-01A One Pack Inoperative
      • 21-51-01-01B Unpressurized Flight
  • 21-51-01-02 Air Conditioning Packs (737-7)
    • 21-51-01-02A Smoke Vent Valve Operates Normally
    • 21-51-01-02B One Pack Inoperative
    • 21-51-01-02C Unpressurized Flight
  • 21-51-02 Pack Flow Control and Shutoff Valves
    • 21-51-02-01 Electronic Flow Control
    • 21-51-02-02 Position Indicator Switch Discrete Signal
      • 21-51-02-02A Failed Open
      • 21-51-02-02B Failed Closed
  • 21-51-03 Fan Bypass Check Valves
    • 21-51-03A Airport OAT Below 80 Deg F (27 Deg C)
    • 21-51-03B Associated Pack Inoperative
    • 21-51-03C One Inoperative, Opposite Pack Operates Normally
  • 21-51-04 Pack Flow Sensors
  • 21-51-05 Pack Temperature Control Valves
    • 21-51-05A Standby Pack Temperature Control Valve Operates Normally
    • 21-51-05B Pack Temperature Control Valve Locked Closed
    • 21-51-05C Associated Pack Not Used
  • 21-51-06 Standby Pack Temperature Control Valves
  • 21-51-07 PACK Light Systems
  • 21-51-08 Pack Control Communication Systems
  • 21-51-09 Pack Ram Air Systems
  • 21-61-01 Pack/Zone Temperature Control Systems
    • 21-61-01A Trim Air Switch Remains OFF
    • 21-61-01B Trim Air Modulating Valve Deactivated CLOSED
  • 21-61-02 ZONE TEMP Lights
  • 21-61-03 Temperature Indications
    • 21-61-03-01 SUPPLY DUCT
    • 21-61-03-02 PASS CABIN
    • 21-61-03-03 PACK
  • 21-61-04 Trim Air Check Valves
  • 21-62-01 Trim Air Pressure Regulating and Shutoff Valve
  • 21-73-01 Ozone Converters

ATA 22

  • 22-10-01 Autopilot Systems
  • 22-11-03 Mode Control Panel Windows
    • 22-11-03-01 IAS/MACH
    • 22-11-03-02 HEADING
    • 22-11-03-03 VERT SPEED
    • 22-11-03-04 ALTITUDE
    • 22-11-03-05 COURSE
    • 22-11-03-06 Window Lighting
  • 22-11-04 Mode Control Panel Selectors
    • 22-11-04-01 Vertical Speed Thumbwheel (DN, UP)
    • 22-11-04-02 Bank Angle Selector (10, 15, 20, 25, 30)
  • 22-11-05 Mode Control Panel Switches
    • 22-11-05-01 A/P ENGAGE Control Wheel Steering (CWS) Switches (A or B)
    • 22-11-05-02 A/P ENGAGE Command (CMD) Switches (A or B)
    • 22-11-05-03 Autothrottle (A/T) ARM Switch
    • 22-11-05-04 SPEED Switch
    • 22-11-05-05 Flight Director (F/D) Switches
    • 22-11-05-06 IAS/MACH Change Over (C/O) Switch
    • 22-11-05-07 Approach (APP) Switch
    • 22-11-05-08 N1, LNAV, VNAV, LVL CHG, V/S, HDG SEL, ALT HLD, and VOR/LOC Switches
    • 22-11-05-09 SPD INTV and ALT INTV Switches
    • 22-11-05-10 Autopilot DISENGAGE Bar
  • 22-11-06 Mode Control Panel Switch Lights
    • 22-11-06-01 A/P ENGAGE Control Wheel Steering (CWS) Switch Lights
    • 22-11-06-02 A/P ENGAGE Command (CMD) Switch Lights
    • 22-11-06-03 A/T ARM Switch Light
  • 22-11-07 Automatic Landing System (Autoland)
    • 22-11-07-01 LAND 3 Autoland
  • 22-11-08 Autoflight Status Annunciator
    • 22-11-08-01 Autopilot (A/P) Disengage Light
    • 22-11-08-02 Autothrottle (A/T) Disengage Light
      • 22-11-08-02A One Inoperative
      • 22-11-08-02B Both Inoperative
  • 22-11-09 Takeoff/Go-Around (TO/GA) Switches
    • 22-11-09A One Inoperative
    • 22-11-09B Both Inoperative
  • 22-11-10 Control Wheel Autopilot Disengage Switches
  • 22-11-11 Altitude Alerting System
    • 22-11-11-01 Aural Alert
    • 22-11-11-02 Visual Alert
  • 22-11-12 Flight Director Systems
  • 22-21-01 Mach Trim Systems
    • 22-21-01A One Inoperative
    • 22-21-01B Both Inoperative
  • 22-23-01 Yaw Damper Function
    • 22-23-01-01 YAW DAMPER Light
  • 22-31-01 Autothrottle System
  • 22-31-02 Thrust Mode Display

ATA 23

  • 23-11-01 High Frequency (HF) Communication System
    • 23-11-01A Not Required by 14 CFR
    • 23-11-01B Operations Requiring Two LRCS
    • 23-11-01-01 HF Data Link
      • 23-11-01-01A Alternate Procedures Required
      • 23-11-01-01B Procedures Do Not Require Use
  • 23-12-01 Very High Frequency (VHF) Communication System
    • 23-12-01-01 VHF Data Link
      • 23-12-01-01A Alternate Procedures Used
      • 23-12-01-01B Procedures Do Not Require Use
  • 23-12-02 Radio Tuning Panel
    • 23-12-02-01 Switch Lights, Key Lights
  • 23-15-01 Satellite Communication System (SATCOM)
    • 23-15-01A Alternate Procedures Required
    • 23-15-01B Procedures Do Not Require Use
    • 23-15-01-01 SATCOM Data Link
      • 23-15-01-01A Alternate Procedures Used
      • 23-15-01-01B Procedures Do Not Require Use
  • 23-24-01 Fixed Emergency Locator Transmitter (ELT)
    • 23-24-01A Required By 14 CFR – Inoperative
    • 23-24-01B Required By 14 CFR – Missing
    • 23-24-01C Not Required By 14 CFR – Inoperative
    • 23-24-01D Not Required By 14 CFR – Missing
    • 23-24-01-01 Remote ELT Switch
    • 23-24-01-02 ELT Indicator Light
  • 23-25-01 Low Frequency Underwater Locating Device (ULD) (upon incorporation of Boeing Service Bulletin 737-23-1621 or production equivalent)
  • 23-27-01 Aircraft Communications Addressing and Reporting System (ACARS)
    • 23-27-01A Alternate Procedures Required
    • 23-27-01B Procedures Do Not Require Use
    • 23-27-01-01 FMC Interface Function
      • 23-27-01-01A Alternate Procedures Required
      • 23-27-01-01B Procedures Do Not Require Use
    • 23-27-01-02 ACARS Printer
  • 23-28-01 Selective Call System (SELCAL)
    • 23-28-01A Alternate Procedures Required
    • 23-28-01B Procedures Do Not Require Use
    • 23-28-01-01 Channels (Including Lights)
      • 23-28-01-01A Alternate Procedures Required
      • 23-28-01-01B Procedures Do Not Require Use
  • 23-31-01 Passenger Address (PA) System
    • 23-31-01A Flight Attendant Alerting System Operates Normally
    • 23-31-01B Not Required By 14 CFR
    • 23-31-01-01 Lavatory Speakers
    • 23-31-01-02 Cabin Speakers
  • 23-31-02 Prerecorded Passenger Announcement System
    • 23-31-02A Alternate Procedures Required
    • 23-31-02B Procedures Do Not Require Use
  • 23-41-01 Service Interphone System
    • 23-41-01-01 Flight Deck to Ground/Ground to Flight Deck Function (Includes Interphone Jack Located on External Power Panel)
      • 23-41-01-01A Flight Interphone Jack Operates Normally
      • 23-41-01-01B Flight Interphone Jack Inoperative
  • 23-42-01 Service (Cabin) Interphone System
    • 23-42-01-01 Flight Deck to Cabin, Cabin to Flight Deck Functions
      • 23-42-01-01A 50% Operate Normally
      • 23-42-01-01B Not Required by 14 CFR
    • 23-42-01-02 Cabin to Cabin Functions
      • 23-42-01-02A Two Attendant Stations
      • 23-42-01-02B Three Attendant Stations
  • 23-42-02 Interphone Handset System
    • 23-42-02-01 Flight Deck
      • 23-42-02-01A Alternate Procedures Required
      • 23-42-02-01B Procedures Do Not Require Use
    • 23-42-02-02 Cabin
  • 23-42-03 Call System (Audio/Visual Alerting)
    • 23-42-03-01 Flight Deck Call Visual Alerting System
    • 23-42-03-02 Flight Deck Call Audio Alerting System
    • 23-42-03-03 Flight Attendant Visual Alerting System
    • 23-42-03-04 Flight Attendant Audio Alerting System
  • 23-42-04 Attendant Control Panels
  • 23-51-01 Flight Deck Speakers
  • 23-51-02 Audio Control Panels (ACP)
    • 23-51-02-01 First Officer
    • 23-51-02-02 Observer
    • 23-51-02-03 Switch Lights
  • 23-51-03 Flight Deck Headsets/Headphones
    • 23-51-03-01 Headset Boom Microphones
      • 23-51-03-01A Hand Microphone Operates Normally
      • 23-51-03-01B Not Required by 14 CFR
    • 23-51-03-02 Headset Earphones/Headphones
    • 23-51-03-03 Active Noise Canceling/Reduction Function
  • 23-51-04 Push-To-Talk (PTT) Switches
    • 23-51-04-01 Control Wheel PTT Switches
    • 23-51-04-02 Audio Control Panel (ACP) PTT Switches
    • 23-51-04-03 Glareshield PTT Switches
      • 23-51-04-03A Required By Procedures
      • 23-51-04-03B Not Required By Procedures
  • 23-51-05 Flight Deck Hand Microphones
    • 23-51-05A Associated Boom Microphone Operates Normally
    • 23-51-05B Procedures Do Not Require Its Use
  • 23-51-06 Flight Interphone System
    • 23-51-06-01 Flight Deck to Ground/Ground to Flight Deck Function (Includes Interphone Jacks Located on External Power Panel and/or in Nose Wheel Well Interphone Box)
      • 23-51-06-01A Service Interphone Operates Normally
      • 23-51-06-01B Alternate Procedures Required
  • 23-51-07 Passenger Cabin Medical Communications System
    • 23-51-07A Alternate Procedures Required
    • 23-51-07B Procedures Do Not Require Use
  • 23-71-01 Cockpit Voice Recorder System (CVR)
    • 23-71-01-01 Recorder Independent Power Supply (RIPS)
  • 23-75-01 Flight Deck Door Visual Surveillance System
    • 23-75-01A Alternate Procedures Required
    • 23-75-01B Flight Deck Door Viewing Port Operates Normally
    • 23-75-01C Procedures Do Not Require Use

ATA 24

  • 24-00-01 Frequency Indications (CPS FREQ)
  • 24-00-02 AC Voltage Indications (AC VOLTS)
  • 24-00-03 AC Ammeter (AC AMPS)
  • 24-00-04 DC Ammeter Indications (DC AMPS)
    • 24-00-04-01 Without AUX BAT
    • 24-00-04-02 With AUX BAT
  • 24-00-05 DC Voltmeter Indications (DC Volts)
    • 24-00-05-01 Without AUX BAT
    • 24-00-05-02 With AUX BAT
  • 24-11-01 Engine Driven Generator Systems
  • 24-11-02 Engine Driven Generator DRIVE Lights
  • 24-11-03 Engine Driven Generator Low Oil Pressure Switch
  • 24-21-01 APU Generator System
  • 24-28-01 GEN OFF BUS Lights
  • 24-28-02 APU GEN OFF BUS Light
  • 24-30-01 ELEC Light
  • 24-31-01 BAT DISCHARGE Light
  • 24-31-02 TR UNIT Light
  • 24-41-01 External Power System

ATA 25

  • 25-00-01 Nonessential Equipment & Furnishings (NEF)
  • 25-11-01 Flight Crew Seats
    • 25-11-01-01 Recline Mechanism
    • 25-11-01-02 Vertical Adjustment
    • 25-11-01-03 Armrests
    • 25-11-01-04 Lumbar/Thigh Supports
    • 25-11-01-05 Headrests
  • 25-11-02 Observer Seats
    • 25-11-02-01 First Observer Seat (Including Associated Equipment)
      • 25-11-02-01A Passenger Seat Available
      • 25-11-02-01B Second Observer Seat Available
      • 25-11-02-01C Associated Safety Equipment Acceptable
    • 25-11-02-02 Second Observer Seat (Including Associated Equipment)
  • 25-20-01 FASTEN SEAT BELT WHILE SEATED Signs or Placards
  • 25-22-01 Passenger Seats (Includes all Configurations and Locations)
    • 25-22-01-01 Positioning Controls for Taxi, Takeoff, and Landing (TTL) (Mechanical and/or Electrical)
      • 25-22-01-01A Seat Secured in the TTL Position
      • 25-22-01-01B Seat Immovable in the TTL Position
    • 25-22-01-02 Underseat Baggage Restraining System
    • 25-22-01-03 Armrests
      • 25-22-01-03-01 Armrests with Seat Positioning Controls for Taxi, Takeoff, and Landing (TTL) and/or Other Controls
      • 25-22-01-03-02 Armrests without Seat Positioning Controls for Taxi, Takeoff, and Landing (TTL) and/or Other Controls
    • 25-22-01-04 Seat Belt Air Bag Restraint Systems
      • 25-22-01-04-01 Seat Belt Air Bags Required by 14 CFR
      • 25-22-01-04-02 Seat Belt Air Bags Not Required by 14 CFR
    • 25-22-01-05 Delethalization Pads
  • 25-25-01 Flight Attendant Seat Assembly (Single or Dual Position)
    • 25-25-01-01 Required Flight Attendant Seats
      • 25-25-01-01A Passengers Carried
      • 25-25-01-01B No Passengers Carried
    • 25-25-01-02 Excess Flight Attendant Seats
  • 25-28-01 Storage Bins/Cabin, Galley, and Lavatory Storage Compartments/Closets
    • 25-28-01A Secured Closed
    • 25-28-01B Door Removed or Retractable Door Secured Open
    • 25-28-01C Failed Closed
    • 25-28-01-01 Multi Latch/Quarter-Turn Lug Installations
    • 25-28-01-02 Storage Compartment Key Locks
  • 25-31-01 Galley/Cabin Waste Receptacle Access Doors/Covers
  • 25-40-01 Exterior Lavatory Door Ashtrays
    • 25-40-01-01 Airplanes With Multiple Exterior Lavatory Door Ashtrays Installed
      • 25-40-01-01A 50% Missing or Inoperative
      • 25-40-01-01B More Than 50% Missing or Inoperative
    • 25-40-01-02 Airplanes With Only One Exterior Lavatory Door Ashtray Installed
  • 25-40-02 Lavatory Waste Container Flapper/Access Doors
  • 25-62-01 Flotation Equipment (Crew and Passengers)
  • 25-63-01 Emergency Evacuation Signal System
    • 25-63-01A Alternate Procedures Required
    • 25-63-01B Procedures Do Not Require Use
  • 25-63-02 Emergency Locator Transmitter (ELT) (Survival)
  • 25-64-01 Megaphones
    • 25-64-01A Passengers Carried
    • 25-64-01B No Passengers Carried
    • 25-64-01-01 Tamper Seals or Tags
  • 25-64-02 Portable Flashlights / Flashlight Holders
    • 25-64-02A Required by 14 CFR
    • 25-64-02B Not Required by 14 CFR
    • 25-64-02-01 Tamper Seals or Tags
  • 25-64-03 Emergency Medical Equipment
    • 25-64-03-01 First Aid Kit (FAK) and/or Associated Equipment
      • 25-64-03-01A Required by 14 CFR
      • 25-64-03-01B Not Required by 14 CFR
      • 25-64-03-01-01 Tamper Seals or Tags
    • 25-64-03-02 Emergency Medical Kit (EMK) and/or Associated Equipment
      • 25-64-03-02A Required by 14 CFR
      • 25-64-03-02B Not Required by 14 CFR
      • 25-64-03-02-01 Tamper Seals or Tags
    • 25-64-03-03 Automatic External Defibrillator (AED) and/or Associated Equipment
      • 25-64-03-03A Required by 14 CFR
      • 25-64-03-03B Not Required by 14 CFR
    • 25-64-03-03-01 Tamper Seals or Tags

ATA 26

  • 26-10-01 Fire Warning System
    • 26-10-01-01 BELL CUTOUT Switch
    • 26-10-01-02 Bell Cutout Function of Master Fire Warning Light
  • 26-11-01 Engine Overheat and Fire Detection Systems
  • 26-11-02 Engine Start Lever Fire Indication Lights
  • 26-14-01 Lavatory Smoke Detection Systems
    • 26-14-01-01 Lavatory Smoke Detector SELF TEST Switch
    • 26-14-01-02 Flight Deck LAVATORY SMOKE Light
      • 26-14-01-02A Alternate Procedures Required
      • 26-14-01-02B Procedures Do Not Require Its Use
  • 26-15-01 APU Fire Detection System
    • 26-15-01-01 APU DET INOP Light
    • 26-15-01-02 External Warning Horn/Warning Light
  • 26-16-01 Lower Cargo Compartment Fire Detection Systems
    • 26-16-01-01 Fwd/Aft Detection Loops
    • 26-16-01-02 DETECTOR FAULT Light
  • 26-18-01 Wheel Well Fire Detection System
    • 26-18-01A Brake Temperature Monitoring System Operates Normally
    • 26-18-01B Brake Temperature Monitoring System Inoperative Or Not Installed
    • 26-18-01-01 Detection Loops
  • 26-18-02 Wing-Body Overheat Detection System
    • 26-18-02-01 Left Loop
    • 26-18-02-02 Right Loop
    • 26-18-02-03 Wing-Body Overheat Test System
  • 26-19-01 Equipment Cooling Smoke Detection System
    • 26-19-01-01 Smoke Detectors
    • 26-19-01-02 EQUIP SMOKE Light
  • 26-20-01 Engine and APU Fire Extinguisher Discharge Lights
    • 26-20-01-01 Engine Fire Extinguisher Discharge Lights
    • 26-20-01-02 APU Fire Extinguisher Discharge Light
  • 26-20-02 Engine/APU Fire Extinguisher Test System
    • 26-20-02-01 APU Fire Extinguisher Squib Test Circuits
    • 26-20-02-02 APU Fire Extinguisher Test Light (Squib Light)
  • 26-22-01 APU Fire Extinguisher System
  • 26-22-02 APU Fire Shutoff System
  • 26-23-01 Lower Cargo Compartment Fire Suppression System
    • 26-23-01-01 DISCH Light
    • 26-23-01-02 Extinguisher Bottle Pressure Switches
    • 26-23-01-03 EXT Light (FWD and AFT) Systems
  • 26-24-01 Lavatory Fire Extinguisher Systems
    • 26-24-01A Lavatory Smoke Detection System Operates Normally
    • 26-24-01B Lavatory Smoke Detection System Inoperative
  • 26-26-01 Portable Fire Extinguishers
    • 26-26-01-01 Tamper Seals or Tags

ATA 27

  • 27-08-01 Control Surface Position Indication System
  • 27-21-01 Rudder Trim Indicator
  • 27-21-02 STBY RUD ON Light
  • 27-24-01 Wheel to Rudder Interconnect System (WTRIS)
  • 27-31-01 FEEL DIFF PRESS Light System
  • 27-51-01 Flap Load Relief Function
  • 27-61-01 Flight Spoiler Systems
    • 27-61-01-01 Spoiler Control Channels
  • 27-61-02 Maneuver Load Alleviation (MLA) Function
  • 27-61-03 Emergency Descent Spoilers (EDS) Function
  • 27-62-01 Auto Speedbrake System
  • 27-62-02 SPEEDBRAKES EXTENDED Light
  • 27-83-01 Autoslat Systems
  • 27-83-02 AUTO SLAT FAIL Light System
  • 27-88-01 Leading Edge Flap/Slat Position Light Systems
    • 27-88-01-01 Leading Edge Indications for Slats 1, 2, 3, 6, 7, and 8 (737-7/-8/-8200)
    • 27-88-01-02 Leading Edge Indications for Slats 1 and 8 (737-9)

ATA 28

  • 28-21-01 Pressure Fueling System
    • 28-21-01-01 Refuel Panel Fuel Quantity Indications
    • 28-21-01-02 Fueling Manifold Check Valves
    • 28-21-01-03 Fueling Shutoff Valves
    • 28-21-01-04 Refuel Panel Fueling Power Control Switch
  • 28-22-01 Main Tank Boost Pumps
  • 28-22-02 Center Tank Boost Pumps
    • 28-22-02A One Pump Inoperative
    • 28-22-02B Both Pumps Inoperative
  • 28-22-03 Center Tank Fuel Boost Pump Automatic Shutoff System
    • 28-22-03A Center Tank Boost Pump Considered Inoperative
    • 28-22-03B Center Tank Remains Empty
    • 28-22-03C Center Tank Fuel Used
  • 28-22-04 Fuel Scavenge System
    • 28-22-04A Valve Closed
    • 28-22-04B Valve Open With Center Tank Fuel
    • 28-22-04C Valve Open With Center Tank Empty
  • 28-22-05 Crossfeed VALVE OPEN Light
  • 28-22-06 SPAR VALVE CLOSED Lights
  • 28-22-07 Fuel Shutoff Valve Battery and Charger
  • 28-25-01 APU DC Fuel Boost Pump
  • 28-25-02 APU Fuel Shutoff Valve
  • 28-41-01 Fuel Quantity Indication Systems
    • 28-41-01-01 Main Tanks
    • 28-41-01-02 Center Tank
      • 28-41-01-02A Center Tank Remains Empty
      • 28-41-01-02B Both Center Tank Fuel Pumps Operate Normally
  • 28-41-02 Total Fuel Quantity Indication
  • 28-42-01 Main Tank LOW PRESSURE Light Systems
    • 28-42-01-01 LOW PRESSURE Lights
  • 28-42-02 Center Tank LOW PRESSURE Light Systems
    • 28-42-02-01 LOW PRESSURE Lights
  • 28-43-01 Fuel Temperature Indicating System
  • 28-44-01 Fuel Measuring Sticks

ATA 29

  • 29-09-01 Hydraulic Reservoir Pressurization System Sources
  • 29-09-02 Hydraulic Reservoir Pressurization System Wheel Well Air Pressure Gauge
  • 29-18-01 Hydraulic Reservoir Fill System
  • 29-31-01 Hydraulic Systems A and B Pressure Indications
  • 29-32-01 Electric Hydraulic Pump Overheat Indication Systems
  • 29-33-01 Hydraulic Systems A and B Flight Deck Quantity Indications
  • 29-33-02 Standby System Low Quantity Indication System
  • 29-33-03 Hydraulic Reservoir Wheel Well Quantity Indicators
  • 29-34-01 Engine Driven Hydraulic Pump Low Pressure Indication Systems
  • 29-34-02 Electric Hydraulic Pump Low Pressure Indication Systems
  • 29-34-03 Standby System Pump Low Pressure Indication

ATA 30

  • 30-11-01 Wing Anti-Ice Valves
    • 30-11-01A Valve Closed
    • 30-11-01B Valve Open
  • 30-11-02 Wing VALVE Lights
  • 30-11-03 Control Stand Wing Anti-Ice Switches
    • 30-11-03A Inoperative Closed
    • 30-11-03B Inoperative Open
  • 30-21-01 Engine (Cowl) Anti-Ice Valves
    • 30-21-01A Valve Closed
    • 30-21-01B Valve Open
  • 30-21-02 Engine Anti-Ice COWL VALVE Position Lights and TAI Indications
    • 30-21-02A Associated Valve Operates Normally
    • 30-21-02B One Per Engine Inoperative
    • 30-21-02C Associated Valve Considered Inoperative
  • 30-21-03 COWL ANTI-ICE Lights
    • 30-21-03A Not Operated In Icing Conditions
    • 30-21-03B Associated Valve Considered Inoperative Open
  • 30-31-01 Pitot Probe Heaters
    • 30-31-01-01 Captain and First Officer Pitot Heaters
    • 30-31-01-02 Auxiliary Pitot Heater (Right Lower Probe)
  • 30-31-02 Total Air Temperature Probe Heater
  • 30-31-03 Angle of Attack Sensor Heaters
  • 30-31-04 Elevator Pitot Probe Heaters
  • 30-31-05 Pitot and Temperature Probe Heater Lights
    • 30-31-05-01 Pitot Probe Heater Lights
    • 30-31-05-02 Total Air Temperature (TAT) Probe Heater Light
      • 30-31-05-02A Associated Heater Verified to Operate Normally
      • 30-31-05-02B Associated Heater Inoperative
  • 30-31-06 Alpha Vane Heater Light Systems
    • 30-31-06A Associated Heater Verified To Operate Normally
    • 30-31-06B Associated Heater Inoperative
  • 30-41-01 Electrically Heated Windshields
    • 30-41-01-01 No. 1 Windows
    • 30-41-01-02 No. 2 Windows
    • 30-41-01-03 No. 3 Window Heat Systems
  • 30-41-02 Windshield Defog System
  • 30-42-01 Windshield Wiper Systems
    • 30-42-01-01 Park Function
    • 30-42-01-02 Intermittent Speed Function
    • 30-42-01-03 Low Speed Function
    • 30-42-01-04 High Speed Function
      • 30-42-01-04A One Inoperative
      • 30-42-01-04B Both Inoperative
  • 30-71-01 Drain Mast Heaters
  • 30-81-01 Ice Detection System
    • 30-81-01A Alternate Procedures Required
    • 30-81-01B Procedures Do Not Require Use

ATA 31

  • 31-25-01 Clock Switches
  • 31-31-01 Flight Data Recorder System (FDR)
    • 31-31-01A Not Required by 14 CFR
    • 31-31-01B Required by 14 CFR
    • 31-31-01-01 FDR Recording Parameters Required by 14 CFR
    • 31-31-01-02 FDR Recording Parameters not Required by 14 CFR
  • 31-31-02 Aircraft Condition Monitoring System (ACMS) Function
  • 31-62-01 MAX Display System (MDS)
    • 31-62-01-01 Display Units (DU)
      • 31-62-01-01-01 Outboard DU
      • 31-62-01-01-02 Inboard DU
      • 31-62-01-01-03 Manual BRT/CONTRAST Controls
  • 31-62-02 Remote Light Sensor (RLS) System
  • 31-62-03 Engine Display Control SELECTORS
  • 31-62-04 Electronic Flight Instrument System (EFIS) Control Panels
    • 31-62-04-01 Minimums (MINS) Reference Selectors
    • 31-62-04-02 MAP Switches
      • 31-62-04-02-01 STA (Station)
      • 31-62-04-02-02 WPT (Waypoint)
      • 31-62-04-02-03 ARPT (Airport)
      • 31-62-04-02-04 DATA
      • 31-62-04-02-05 POS (Position)

ATA 32

  • 32-30-01 Landing Gear Actuation System
  • 32-31-01 Landing Gear Selector Bypass Valve
  • 32-31-02 Landing Gear Control Systems
    • 32-31-02A One Inoperative
    • 32-31-02B Both Inoperative
  • 32-31-03 Landing Gear Lever Input Systems
  • 32-32-01 Main Landing Gear Uplock Springs
  • 32-32-02 Main Landing Gear Frangible Fitting
  • 32-35-01 Landing Gear Manual Extension System
  • 32-41-01 Hydraulic Brake Pressure Indication System
    • 32-41-01-01 Wheel Well Brake Accumulator Gauge
    • 32-41-01-02 Flight Deck Brake Pressure Indicating System
  • 32-41-02 Gear Retraction Braking System
  • 32-42-01 Antiskid System
  • 32-42-02 Alternate Antiskid Valves
  • 32-42-03 Automatic Brake System
  • 32-44-01 Parking Brake Valve
  • 32-44-02 Parking Brake Light
    • 32-44-02-01 Flight Deck Parking Brake Light
    • 32-44-02-02 External Parking Brake Light
      • 32-44-02-02A Required By Procedures
      • 32-44-02-02B Procedures Do Not Require Its Use
  • 32-46-01 Brake Temperature Monitoring System
    • 32-46-01A Required By Procedures
    • 32-46-01B Procedures Do Not Require Use
  • 32-49-01 Tire Pressure Indication System
    • 32-49-01A Required By Procedures
    • 32-49-01B Procedures Do Not Require Use
  • 32-51-01 Rudder Pedal Nose Wheel Steering System
  • 32-51-02 Nose Wheel Steering Switch
  • 32-71-01 Two-Position Tail Skid
    • 32-71-01-01 737-8/-8200
      • 32-71-01-01-01 Retraction Mechanism
        • 32-71-01-01-01A Tail Skid Locked in Retracted Position
        • 32-71-01-01-01B Tail Skid Locked in Extended Position
      • 32-71-01-01-02 Cartridge Core Assembly
    • 32-71-01-02 737-9
      • 32-71-01-02-01 Retraction Mechanism
        • 32-71-01-02-01A Tail Skid Locked in Retracted Position
        • 32-71-01-02-01B Tail Skid Locked in Extended Position
      • 32-71-01-02-02 Cartridge Core Assembly

ATA 33

  • 33-11-01 Flight Compartment and Instrument Lighting System
  • 33-11-02 System Annunciator Lights (Glareshield Panel)
    • 33-11-02A Light for Operative System
    • 33-11-02B Light for Inoperative System
  • 33-11-03 Main Panel Light Controls
  • 33-16-01 Master Lights Test and Dim System
    • 33-16-01-01 Master and Individual Light’s Test Function
    • 33-16-01-02 Dim Function
  • 33-21-01 Cabin Interior Illumination
    • 33-21-01-01 Without Photoluminescent Emergency Escape Path Marking System
    • 33-21-01-02 With Photoluminescent Emergency Escape Path Marking System
  • 33-24-01 Passenger Lighted Information Signs and Notice System
    • 33-24-01-01 Individual Passenger Lighted Information Signs
      • 33-24-01-01A PA System Inoperative
      • 33-24-01-01B PA System Operates Normally
    • 33-24-01-02 Aural Tone System
    • 33-24-01-03 Flight Deck Automatic Function
  • 33-25-01 Sterile Flight Compartment Light System
    • 33-25-01A Alternate Procedures Required
    • 33-25-01B Procedures Do Not Require Use
  • 33-31-01 Wheel Well Lights
  • 33-37-01 Lower Cargo Compartment Light Systems
    • 33-37-01-01 Forward Compartment Light Lens
    • 33-37-01-02 Aft Compartment Light Lens
  • 33-41-01 Wing Illumination Lights
  • 33-42-01 Landing Light LED Array Systems
    • 33-42-01A One Inoperative Per Side
    • 33-42-01B Runway Turnoff Lights Operate Normally
    • 33-42-01C Day Operations
    • 33-42-01-01 Alternate Flash Function
  • 33-42-02 Taxi Light LED Array Systems
  • 33-42-03 Runway Turnoff Light LED Array Systems
  • 33-43-01 Position Light LED Modules
    • 33-43-01A Day Operations
    • 33-43-01B All Operations
  • 33-43-02 Winglet Aft Marker Lights
    • 33-43-02A Alternate Procedures Required
    • 33-43-02B Procedures Do Not Require Use
  • 33-44-01 Red ANTI-COLLISION Lights
    • 33-44-01A All Operations
    • 33-44-01B Day Operations
  • 33-44-02 White Anti-Collision STROBE Lights
    • 33-44-02A All Operations
    • 33-44-02B Day Operations
  • 33-45-01 Logo Light System
  • 33-51-01 Interior Emergency Lighting System
    • 33-51-01-01 Aisle Lights
    • 33-51-01-02 Flight Deck Exit Light
  • 33-51-02 Exterior Emergency Lighting System
  • 33-51-03 Floor Proximity Emergency Escape Path Marking System
    • 33-51-03-01 Incandescent Lighting System
      • 33-51-03-01-01 Floor Aisle Marker Lights
      • 33-51-03-01-02 Sidewall Exit Indicator Lamps/Bulbs
    • 33-51-03-02 Photoluminescent Lighting System
      • 33-51-03-02-01 Photoluminescent Strips
      • 33-51-03-02-02 Sidewall Exit Indicator Lamps/Bulbs

ATA 34

  • 34-16-01 Mach/Airspeed Warning Systems
  • 34-23-01 Standby Magnetic Compass
  • 34-24-01 Integrated Standby Flight Display (ISFD)
    • 34-24-01-01 Attitude Indication
    • 34-24-01-02 Approach Mode
    • 34-24-01-03 Heading Display
    • 34-24-01-04 Switch Lights
    • 34-24-01-05 Dedicated Battery
  • 34-31-01 Instrument Landing Systems (ILS)
  • 34-31-02 Global Navigation Satellite Landing System (GLS)
  • 34-32-01 Marker Beacon System
  • 34-33-01 Radio Altimeter Systems
  • 34-36-01 Head-Up Display (HUD) System
    • 34-36-01A Alternate Procedures Used
    • 34-36-01B Procedures Do Not Require Use
    • 34-36-01-01 Low Visibility Takeoff Function
      • 34-36-01-01A Takeoff Minimums Do Not Require Use
      • 34-36-01-01B Procedures Do Not Require Use
    • 34-36-01-02 Brightness (BRT) Control
  • 34-41-01 Weather Radar System
    • 34-41-01A Dual Channel Configuration – One Operative
    • 34-41-01B GPWS Reactive Windshear (Mode 7) Operative
    • 34-41-01C GPWS Reactive Windshear (Mode 7) Inoperative
    • 34-41-01-01 Predictive Windshear (PWS) Function
      • 34-41-01-01A GPWS Reactive Windshear (Mode 7) Operative
      • 34-41-01-01B GPWS Reactive Windshear (Mode 7) Inoperative
    • 34-41-01-02 Auto Tilt Function
  • 34-45-01 Traffic Alert and Collision Avoidance System (TCAS)
    • 34-45-01-01 Resolution Advisory (RA) Display Systems
      • 34-45-01-01A Inoperative For Non-Flying Pilot
      • 34-45-01-01B Procedures Do Not Require Use
    • 34-45-01-02 Traffic Alert (TA) Display Systems
    • 34-45-01-03 Audio Function
    • 34-45-01-04 Airspace Selection Function
  • 34-49-01 Ground Proximity Warning System (GPWS)
    • 34-49-01-01 GPWS Function
      • 34-49-01-01-01 Modes 1-4
      • 34-49-01-01-02 Excessive Deviation Below Glideslope (Mode 5)
      • 34-49-01-01-03 Advisory Altitude/Bank Angle Callout (Mode 6)
        • 34-49-01-01-03A Required by 14 CFR
        • 34-49-01-01-03B Not Required by 14 CFR
      • 34-49-01-01-04 Reactive Windshear (RWS) Detection (Mode 7)
        • 34-49-01-01-04A Predictive Windshear Inoperative
        • 34-49-01-01-04B Predictive Windshear Operative
      • 34-49-01-01-05 Test Mode
    • 34-49-01-02 Terrain Awareness Function
    • 34-49-01-03 Terrain Displays
      • 34-49-01-03A One Inoperative
      • 34-49-01-03B Both Inoperative
    • 34-49-01-04 Runway Awareness and Advisory System (RAAS)
  • 34-51-01 VOR Systems
  • 34-53-01 ATC Transponder/Automatic Altitude Reporting Systems
    • 34-53-01A One Inoperative
    • 34-53-01B Both Inoperative
    • 34-53-01-01 Elementary and Enhanced Downlink Aircraft Reportable Parameters Not Required by 14 CFR
    • 34-53-01-02 ADS-B Out Extended Squitter
      • 34-53-01-02A ATC Authorization Required
      • 34-53-01-02B Required by 14 CFR
      • 34-53-01-02C Alternate Procedures Required
  • 34-55-01 Distance Measuring Equipment (DME) Systems
  • 34-57-01 Automatic Direction Finder (ADF) System
  • 34-58-01 Global Positioning System (GPS)
    • 34-58-01A One Inoperative
    • 34-58-01B Both Inoperative
  • 34-61-01 Flight Management Computer System (FMCS)
    • 34-61-01-01 Computer
      • 34-61-01-01A 1 Computer Operates Normally
      • 34-61-01-01B All Computers Inoperative
    • 34-61-01-02 Navigation Databases
    • 34-61-01-03 CDU/MCDU
      • 34-61-01-03A One Inoperative
      • 34-61-01-03B Both Inoperative
      • 34-61-01-03-01 Switch Lights/Key Lights
    • 34-61-01-04 FMC Alert Lights
      • 34-61-01-04A One Inoperative
      • 34-61-01-04B Both Inoperative
  • 34-65-01 Vertical Situation Display (VSD) System
    • 34-65-01A Alternate Procedures Required
    • 34-65-01B Procedures Do Not Require Use

ATA 35

  • 35-11-01 Crew Oxygen System
    • 35-11-01-01 Flight Deck Crew Oxygen Pressure Indicator
    • 35-11-01-02 Overboard Vent and Discharge Indicator Disk
  • 35-11-02 Crew Oxygen External Fill Panel
    • 35-11-02-01 Crew Oxygen Pressure Indicator
  • 35-21-01 Passenger Oxygen System
    • 35-21-01A Operation At Or Below FL250
    • 35-21-01B Operation At Or Below 10,000 Ft. MSL
  • 35-21-02 Oxygen Service Units (Passenger, Attendant, Lavatory)
    • 35-21-02-01 Automatic Presentation System
    • 35-21-02-02 Door Latches
  • 35-31-01 Portable Oxygen Bottles or Units (Including Masks and Hoses)
    • 35-31-01-01 Tamper Seals or Tags
  • 35-31-02 Portable Protective Breathing Equipment (PBE)
    • 35-31-02-01 Tamper Seals or Tags

ATA 36

  • 36-11-01 Engine Bleed Air Control Systems
    • 36-11-01-01 Primary Control Card
    • 36-11-01-02 Anti-Ice Inhibit Function
    • 36-11-01-03 Backup Control Card
      • 36-11-01-03A ASC Health Monitor Operates Normally
      • 36-11-01-03B PRSOV Is Not Used
    • 36-11-01-04 Air Supply Controller (ASC) Bleed System Health Monitor
      • 36-11-01-04A Both Control Cards Operate Normally
      • 36-11-01-04B PRSOV Is Not Used
    • 36-11-01-05 Bleed Control Backup Protection Functions
      • 36-11-01-05A Primary Control Card Operates Normally
      • 36-11-01-05B Associated PRSOV Is Not Used
    • 36-11-01-06 Bleed Control Engine Data
  • 36-11-02 Engine Bleed Air Control Sensors
    • 36-11-02-01 Manifold Pressure (PM2) Sensors
    • 36-11-02-02 Intermediate Pressure (PI) Sensors
  • 36-11-03 Pressure Regulating and Shutoff Valve (PRSOV) Systems
    • 36-11-03-01 Pressure Regulating and Shutoff Valves
      • 36-11-03-01A One Inoperative
      • 36-11-03-01B Both Inoperative
  • 36-11-04 High Pressure Shutoff Valve (HPSOV) Systems
    • 36-11-04-01 High Pressure Shutoff Valves
    • 36-11-04-02 HPSOV Control
  • 36-11-05 Engine BLEED Lights
    • 36-11-05A One Inoperative
    • 36-11-05B Both Inoperative
  • 36-11-06 Duct Vent Valve
    • 36-11-06A Valve Closed
    • 36-11-06B Valve Open
  • 36-12-01 Fan Air Modulating Valve (FAMV) Systems
    • 36-12-01-01 Fan Air Modulating Valves
  • 36-13-01 Bleed Air Isolation Valve
  • 36-13-02 Bleed Air Isolation Valve Control
    • 36-13-02A Verification using Visual Position Indicator
    • 36-13-02B Verification from Flight Deck
  • 36-13-03 Ground Pneumatic Connector Check Valve
    • 36-13-03A Valve Open
    • 36-13-03B Valve Closed
  • 36-21-01 Bleed Air Duct Pressure Indications
  • 36-21-02 Dual Bleed Light System

ATA 38

  • 38-10-01 Potable Water System
    • 38-10-01A Individual Components Deactivated/Isolated
    • 38-10-01B System Drained and Not Serviced
  • 38-30-01 Lavatory Waste System
    • 38-30-01A Individual Components Deactivated/Isolated
    • 38-30-01B Lavatory Not Used
    • 38-30-01-01 Vacuum Blower

ATA 46

  • 46-13-01 Onboard Network System (ONS)
    • 46-13-01A Alternate Procedures Used
    • 46-13-01B Procedures Do Not Require Use
  • 46-20-01 Electronic Flight Bag (EFB) Systems
    • 46-20-01-01 EFB System (Installed EFB System)
      • 46-20-01-01A Alternate Procedures Required
      • 46-20-01-01B Procedures Do Not Require Use
    • 46-20-01-02 Data Connectivity
      • 46-20-01-02A Alternate Procedures Required
      • 46-20-01-02B Procedures Do Not Require Use
    • 46-20-01-03 Power Supply / Power Connection
      • 46-20-01-03A Alternate Procedures Required
      • 46-20-01-03B Procedures Do Not Require Use
    • 46-20-01-04 Mounting Device
      • 46-20-01-04A Alternate Procedures Required
      • 46-20-01-04B Procedures Do Not Require Use

ATA 47

  • 47-11-01 Nitrogen Generation System (NGS)
    • 47-11-01-01 Nitrogen Generation Degraded

ATA 49

  • 49-11-01 Auxiliary Power Unit
  • 49-15-01 APU Air Inlet Door
    • 49-15-01A Door Inoperative in Flight Open Position
    • 49-15-01B Door Inoperative in Closed Position
    • 49-15-01C APU Not Required
    • 49-15-01-01 APU Air Inlet DOOR Light System
      • 49-15-01-01A APU Air Inlet Door Inoperative
      • 49-15-01-01B APU Air Inlet Door Operative
  • 49-40-01 Start Power Unit
    • 49-40-01-01 AC/DC Start Systems
  • 49-40-02 Start Converter Unit
    • 49-40-02-01 Voltage Regulator Function
  • 49-52-01 APU Bleed Air System
    • 49-52-01A Bleed Air Valve Closed
    • 49-52-01B APU Not Used
  • 49-52-02 APU Surge Control System
    • 49-52-02A Surge Control Valve Open
    • 49-52-02B Surge Control Valve Closed
  • 49-70-01 APU FAULT Light
  • 49-70-02 APU LOW OIL PRESSURE Light
  • 49-70-03 APU OVERSPEED Light

ATA 50

  • 50-10-01 Lower Cargo Compartment Lining Panels and Floor Panels
  • 50-21-01 Automatic Cargo Loading Systems
  • 50-21-02 Cargo Compartment Restraint Components
    • 50-21-02A Cargo Compartment Used
    • 50-21-02B Cargo Compartment Remains Empty
    • 50-21-02C Cargo Compartment Inoperative

ATA 52

  • 52-11-01 Left Main Cabin Door Pressure Stop Fittings
    • 52-11-01-01 Forward Entry Door
    • 52-11-01-02 Aft Door
  • 52-11-02 Entry/Service Door Hold-Open Latch Assemblies
    • 52-11-02-01 Latch Release Lever
  • 52-22-01 Flight Lock System
  • 52-31-01 Lower Cargo Doors Pressure Stop Fittings
    • 52-31-01-01 Pressurized Flight
    • 52-31-01-02 Unpressurized Flight
  • 52-31-02 Lower Cargo Doors Door Balance Mechanism
  • 52-31-03 Lower Cargo Doors Hold Open Device
    • 52-31-03A Door Balance Mechanism Operates Normally
    • 52-31-03B Cargo Compartment Remains Empty
  • 52-31-04 Cargo Door Exterior Handle Recess/Hinge Spring Assemblies
  • 52-51-01 Flight Deck Door Automatic Locking System
    • 52-51-01-01 Flight Deck Access Panel System (Keypad, Door Chime)
      • 52-51-01-01-01 LEDs
      • 52-51-01-01-02 Door Bell Mode
      • 52-51-01-01-03 Switch Guard
    • 52-51-01-02 Flight Deck Door LOCK FAIL Light
    • 52-51-01-03 Flight Deck Door AUTO UNLK Light
    • 52-51-01-04 Flight Deck Door Lock Control Selector
  • 52-51-02 Flight Deck Door Deadbolt
  • 52-51-03 Flight Deck Door Pressure Relief Panels
  • 52-51-04 Flight Deck Door Viewing Port
    • 52-51-04A Alternate Procedures Required
    • 52-51-04B Electronic Flight Deck Door Visual Surveillance System Operates Normally
  • 52-61-01 Forward Air Stair
  • 52-71-01 Door Warning Light System
    • 52-71-01-01 Entry and Service Doors
    • 52-71-01-02 Cargo and Access Doors
    • 52-71-01-03 Airstair Door
    • 52-71-01-04 Overwing Doors
    • 52-71-01-05 Mid-Cabin Doors (737-8200/-9)
  • 52-71-02 Door Programming Pin Fault

ATA 71

  • 71-11-01 Fan Cowl Latch Indication Systems (upon incorporation of Boeing Service Bulletin 737-71-1894 or production equivalent)

ATA 73

  • 73-11-01 Engine Fuel Strainer Sensors
  • 73-21-01 DELETED (Electronic Engine Control (EEC) Normal Mode)
  • 73-30-01 Fuel Control ENG VALVE CLOSED Indicating System
  • 73-31-01 Fuel Flow Indications
  • 73-34-01 Fuel Filter Bypass Indication Systems
    • 73-34-01-01 Engine Main Fuel/Oil Heat Exchanger Sensors
    • 73-34-01-02 Engine Fuel Filter Sensors

ATA 74

  • 74-00-01 Ignition Systems
    • 74-00-01-01 Left Ignition Systems
      • 74-00-01-01A ER Operations Allowed
      • 74-00-01-01B Non ER Operations
    • 74-00-01-02 Right Ignition Systems
      • 74-00-01-02A ER Operations Allowed
      • 74-00-01-02B Non ER Operations

ATA 75

  • 75-23-01 EEC Cooling Systems
  • 75-23-02 Modulated Turbine Cooling (MTC) Systems
  • 75-24-01 Turbine Case Cooling Air Flow Systems
    • 75-24-01-01 High Pressure Turbine Active Clearance Control (HPTACC) Valves

ATA 77

  • 77-21-01 Abnormal Start Indication Systems
  • 77-31-01 Engine Vibration Indications

ATA 78

  • 78-31-01 Thrust Reverser Systems
  • 78-34-01 Reverse Thrust Lever Interlocks
    • 78-34-01A Interlock Released
    • 78-34-01B Interlock Not Released
  • 78-36-01 REVERSER LIMITED Lights (Aft Overhead Panel)

ATA 79

  • 79-21-01 Engine Oil Debris Monitoring System (ODMS)
    • 79-21-01-01 Engine Oil Debris Monitoring System (ODMS) Sensor
  • 79-31-01 Oil Quantity Indication Systems
  • 79-35-01 Oil Filter Bypass Warning Systems

ATA 80

  • 80-11-01 Starter Valve Open Alerts
  • 80-11-02 Engine Start Switch Ground Hold/Cutout Systems
  • 80-11-03 Engine Start Valves

Note: The above MEL items are for reference only. It is not customized for any specific airplane configuration. The user must determine the applicability of this reference material for use in their MEL. All of the MEL items are from the FAA 737 MAX MMEL Revision 5.

AviationHunt Team

Our team at AviationHunt is a group of aviation experts and enthusiasts. We aim to provide aviation insights, technical notes, best aircraft maintenance practices, and aviation safety tips.

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