Airbus A320 ATA 05 Technical Notes

ATA 05 – TIME LIMITS – MAINTENANCE CHECKS

• Scheduled Maintenance Checks –
  • Zonal inspections – ATA 05 (requirements of the MPD)
  • MPD – Separately provided
  • Airworthiness Limitation Section (ALS) – Separately provided
• Unscheduled maintenance checks – ATA 05
  • Inspection after special or abnormal conditions
  • Pressurization test after abnormal operation or repair
  • Special or check flights (non-revenue flights)

HARD LANDING

• Load Report 15 – If hard landing occurs only on MLG
• If LR15 trigger codes 7XXX – Normal Landing, No Action Required – GO
• If LR15 trigger codes 4XXX – Hard Landing / Hard Overweight Landing – NOGO
  • Check Nz & Ny kpi values
  • Nz kpi: Vertical acceleration, aircraft gross weight, and roll angle.
  • Ny kpi: Lateral acceleration and bounce landing.
• Nz kpi / Ny kpi indicator – Aircraft having enhanced DMU/FDIMU.
• FDIMU (Computer) = DMU part + FDIU part
• Hard landing on MLG – Assessment is based on Nz kpi and Ny kpi.
  • Green Zone – Normal
    • Trigger codes – 7XXX
  • Amber Zone – Hard / Hard overweight
    • Nz => 1.8 ; Ny => 0.45
    • Trigger codes – 4520 or 4620. (Hard)
    • Trigger codes – 4420 or 4320. (Hard overweight)
    • Inspection required
  • Red Zone – Severe hard / Severe hard-overweight
    • Nz => 2.06 ; Ny => 0.5
    • Trigger codes – 4510 or 4610. (Severe hard)
    • Trigger codes – 4410 or 4310. (Severe hard-overweight)
    • Inspection + Send raw data from DFDR or QAR to Airbus and obey airbus instructions.
• When there are several valid trigger conditions, the minor triggered code has priority and is the only one printed on the report.
• Hard landing on NLG – A hard landing on NLG is a landing where flight crew report gives the information about:
  • A touchdown on the NLG or
  • A hard touchdown on the MLG and NLG at the same time or
  • A landing with high pitch-rate de-rotation.
  • >> Inspection + Send raw data from DFDR or QAR to Airbus and obey airbus instructions.
• You must not use the load report <15> to confirm a hard landing on NLG.
• Load-Report – Make sure that the applicable load-report print-out is available.
  • If not, check if the related report is available in the DMU/FDIMU memory and do a printout of Stored Reports.
    • MCDU > AIDS > STORED REPORTS
  • Trigger code 1000 is a manual report request. It can not be used for a confirmation of a hard/overweight landing or excessive turbulence.
  • Trigger codes 2000 and 3XXX are not used in report 15.
  • Trigger codes 5XXX – used for excessive turbulence.
• If you are not sure that the load report values are correct – Download the DFDR data and do a DFDR data analysis to make sure that the values are correct.
  • or Download DMU data to a PCMCIA-CARD. FDIMU is able to record AIDS data on an external Digital AIDS Recorder (DAR) and on an FDIMU integrated Smart AIDS Recorder (SAR) or on the PCMCIA card.
• If the pilots reported a hard landing event but you cannot find the category of the landing because the load report <15> is not available: – Contact Airbus and Send the raw data of the event from the DFDR or the QAR to Airbus.
  • if the QAR or DFDR data cannot be downloaded immediately – You must do the inspection after a severe hard landing or a severe hard-overweight landing (Red zone). >> If you do not find damage during this inspection, the aircraft can temporarily return to service. >> In the shortest possible period and in less than 200 Flight cycles or 30 days.

BIRD STRIKE

• Use Gloves – Health Risk
• Use a plastic bag – to collect bird remains
• Before start – get information from crew about the flight conditions:
  • Engine behavior,
  • Smell in the air conditioning outlets,
  • Navigation and radio system behavior,
  • Aircraft configuration (position of the landing gears and the flight controls),
  • Flight phase at the time when the impact occurred.
• Do the inspection in three steps –
  • First step is a walk-around visual inspection of all aircraft surfaces. This is to find signs of bird strike and/or damage (identification of impacted areas). Do the walk-around visual inspection from –
    • Ground
    • Cabin windows
    • 10 FT trestle near – radome and aft pax doors.
  • Second step is cleaning of bird strike signs.
  • Third step is inspection of affected parts/zones.