737 Flight Crew Operations Manual
Fire Protection -
Controls and Indicators
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 8.10.5
6 APU BOTTLE DISCHARGE 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
AFTFWD
ARMEDARMED
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
September 15, 2016
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