OVERHEAT/FIRE Test Detection . . . . . . . . . . . . . . . . . . . . . 8.20.7 Extinguisher Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.20.8
Cargo Fire System Tests (as installed) . . . . . . . . . . . . . . . . . . . . . 8.20.8 Cargo Fire TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.20.8 Cargo Fire Extinguisher Test . . . . . . . . . . . . . . . . . . . . . . . . . . 8.20.8
Copyright . The Boeing Company. See title page for details.
8.TOC.0.2 June 4, 2004
Overheat/Fire Protection Panel Switches
Overheat Detector (OVHT DET) Switch
NORMAL – detection loop A and loop B are active.
A – detection loop A is active.
B – detection loop B is active.
Fire Warning BELL CUTOUT Switch
Push –
.
extinguishes both master FIRE WARN lights
.
silences the fire warning bell
.
silences the remote APU fire warning horn (on the ground only)
.
resets the system for additional warnings.
Extinguisher (EXT) TEST Switch
(spring–loaded to center)
1 or 2 – tests bottle discharge circuits for all three extinguisher bottles and on some
airplanes the three amber BOTTLE DISCHARGE lights.
FAULT/Inoperative (INOP) and Overheat (OVHT)/FIRE TEST Switch
(spring–loaded to center)
FAULT/INOP – tests fault detection circuits for both engines and the APU.
Fire Protection -Controls and Indicators
737 Operations Manual
OVHT/FIRE – tests overheat and fire detection loops on both engines and APU, and wheel well fire detector
Note: See Fire and Overheat Detection System Fault Test in Section 20.
APU Fire Warning Switch
Illuminated (red) –
.
indicates fire in APU
.
unlocks APU fire warning switch. Note: Master FIRE WARN lights illuminate, fire warning bell sounds, APU fire warning horn in main wheel well sounds (on ground only), and APU fire
warning light flashes. In – normal position, mechanically locked if no fire signal. Up –
.
arms APU extinguisher circuit
.
closes APU fuel shutoff valve, APU bleed air valve, and APU inlet door
.
trips generator control relay and breaker
.
allows APU fire warning switch to rotate. Rotate (left or right) –
.
discharges APU fire bottle.
Engine Fire Warning Switch
Illuminated (red) –
.
indicates fire in related engine
.
unlocks related engine fire warning switch. Note: Master FIRE WARN lights illuminate and fire warning bell sounds. In – normal position, mechanically locked if no fire signal. Up –
.
arms one discharge squib on each engine fire extinguisher
.
closes fuel, hydraulic shutoff and engine bleed air valves
.
disables thrust reverser
.
trips generator control relay and breaker
.
deactivates engine driven hydraulic pump LOW PRESSURE light
.
allows engine fire warning switch to rotate. Rotate (left or right) – discharges related fire bottle.
Copyright . The Boeing Company. See title page for details.
8.10.2 December 1, 2000
Fire Protection -Controls and Indicators
Fire Warning Switch Override
Fire Warning Switch Override
Push – unlocks fire warning switch.
Overheat/Fire Protection Panel Lights
Engine (ENG) OVERHEAT Light
Illuminated (amber) – indicates overheat in related engine.
Note: MASTER CAUTION and OVHT/DET system annunciator lights illuminate.
FAULT Light
Illuminated (amber) – with the overheat detector switch in NORMAL – indicates both detector loops for an engine have failed.
Fire Protection -Controls and Indicators
737 Operations Manual
Illuminated (amber) – with the overheat detector switch in A or B – indicates the related loop for an engine has failed.
Note: MASTER CAUTION and OVHT/DET system annunciator lights do not illuminate.
WHEEL WELL Fire Warning Light
Illuminated (red) – indicates fire in main gear wheel well
Note: Master FIRE WARN lights illuminate and fire warning bell sounds.
Engine BOTTLE DISCHARGE Light
Illuminated (amber) – indicates related fire extinguisher bottle has discharged.
APU Detector Inoperative (DET INOP) Light
Illuminated (amber) – indicates APU detector loop has failed.
Note: MASTER CAUTION and OVHT/DET system annunciator lights illuminate.
APU BOTTLE DISCHARGE Light
Illuminated (amber) – indicates APU extinguisher bottle has discharged.
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本文链接地址：737-300机组操作手册Flight Crew Operations Manual FCOM 2(66)
