737 MAX Flight Crew Operations Manual
Fire Protection -
Controls and Indicators
MN-FLT-OH-201
8.10.5
6
APU BOTTLE DISCHARGED Light
Illuminated (amber) – indicates APU extinguisher bottle has discharged.
7
Extinguisher Test (EXT TEST) Lights
Illuminated (green) – EXT TEST switch is positioned to 1 or 2 and circuit
continuity is normal.
Cargo Fire Panel
1
Extinguisher (EXT) Test Lights
Illuminated (green) - Cargo Fire TEST switch is pushed and fire bottle discharge
squib circuit continuity is normal.
2
Detector Select (DET SELECT) Switches
NORM - detection loop A and B are active.
A - detection loop A is active.
B - detection loop B is active.
3
DETECTOR FAULT Light
Illuminated (amber) -
• One or more of the selected detector loop(s) in either cargo
compartment has failed.
FWD
AFT
ARM
AFT
FWD
ARMED
ARMED
DISCH
DISCH
TEST
FWD AFT
NORM
A
B
NORM
A
B
FAULT
DETECTOR
DET SELECT
EXT
C
O
G
R
A
F
E
R
I
6
AFT ELECTRONIC PANEL
3
2
1
4
8
7
5
March 1, 2021
