Illuminated (red) – indicates a fire warning (or system test) in one or more of the following:
engine
APU
main wheel well
cargo
Associated aural alarms include:
fire warning bell
if on ground, remote APU fire warning horn.
Push – extinguishes both master FIRE WARN lights
silences fire warning bell
silences remote APU fire warning horn
resets system for additional warnings.
Note: Pushing fire warning bell cutout switch on overheat/fire protection panel results in the same actions.
MASTER CAUTION Lights
Illuminated (amber) – a system annunciator light has illuminated.
Push – extinguishes both MASTER CAUTION lights
system annunciator light(s) extinguish
resets system for additional master caution conditions.
System Annunciator Panel
Illuminated (amber) – an amber light, relating to illuminated system annunciator, has illuminated on forward overhead, aft overhead or overheat/fire protection panel.
To extinguish – push either MASTER CAUTION light.
To recall – push and release either system annunciator panel
if a master caution condition exists, appropriate system annunciator(s) and MASTER CAUTION lights illuminate
a single fault in certain redundant systems, or some simple faults, cause the system annunciator light to illuminate during a recall. The system annunciator light will extinguish when the MASTER CAUTION light is pushed.
