737 MAX Flight Crew Operations Manual
Normal Procedures -
Amplified Procedures
MN-FLT-OH-201
NP.21.26
MAX8 Fleet Only
Right SELECTOR switch ................................................................C
Overheat and fire protection panel ........................................... Check
Do this check on the first flight in the aircraft if the flight crew did
not do the Electrical Power Up supplementary procedure.
Verify that the engine No. 1, APU, and engine No. 2 fire switches
are in.
Alert ground personnel before the following test is accomplished:
OVERHEAT DETECTOR switches - NORMAL
TEST switch - Hold to FAULT/INOP
Verify that the MASTER CAUTION lights are illuminated.
Verify that the OVHT/DET annunciator is illuminated.
Verify that the FAULT light is illuminated.
If the FAULT light fails to illuminate, the fault
monitoring system is inoperative.
Verify that the APU DET INOP light is illuminated.
Do not run the APU if the APU DET INOP light does
not illuminate.
Note:
the fire warning light flashes and the horn sounds on the
APU ground control panel when this test is done with the
APU running. This can be mistaken by the ground crew as
an APU fire.
TEST Switch - Hold to OVHT/FIRE
Verify that the fire warning bell sounds.
Verify that the master FIRE WARN lights are illuminated.
Verify that the MASTER CAUTION lights are illuminated.
Verify that the OVHT/DET annunciator is illuminated.
Master FIRE WARN light - Push
Verify that the master FIRE WARN lights are extinguished.
Verify that the fire warning bell cancels.
Verify that the engine No. 1, APU and engine No. 2 fire switches
stay illuminated.
Verify that the engine No. 1 and engine No. 2 start levers stay
illuminated (as installed).
March 1, 2021