737 MAX Flight Crew Operations Manual
Fire Protection -
Controls and Indicators
8.10.6
MN-FLT-OH-201
4
Cargo Fire TEST Switch
PUSH - tests circuits for both forward and aft cargo fire detector loops and
suppression system.
Note:
See Cargo Fire System Tests in Section 20.
5
Cargo Fire ARM Switches
PUSH -
• FWD ARMED - extinguisher armed for the forward cargo compartment
• AFT ARMED - extinguisher armed for the aft cargo compartment.
Note:
If the first bottle has discharged and the system remains armed, the second
bottle discharge is inhibited upon landing. The second bottle discharge
timer is disabled when the system is disarmed.
6
Cargo Fire (FWD/AFT) Warning Lights
Illuminated (red) -
• at least one detector in each loop detects smoke
• with power failed in one loop, at least one detector on the remaining
loop detects smoke.
Note:
Master FIRE WARN lights illuminate and fire warning bell sounds.
7
Cargo Fire Bottle Discharge (DISCH) Light
Illuminated (amber) - indicates that either extinguisher bottle has discharged
8
Cargo Fire Discharge (DISCH) Switch
PUSH - if system is armed, discharges the first extinguisher bottle. The timer is
set for 15 minutes to discharge the second extinguisher bottle.
Master Fire Warning Light
BELL CUTOUT
WARN
FIRE
1
GLARESHIELD
March 1, 2021
