B737 Fire Protection

Pulling the engine fire warning switch up. Closes both the engine fuel shutoff valves and the spar fuel shutoff valves. Closes both the engine fuel shutoff valves and the spar fuel shutoff valves only if the battery switch is ON. Closes the hydraulic fluid shutoff valves and disables the thrust reverser for the related engine. Both A and C.

Some of the indications for an engine fire are the MASTER CAUTION lights, the ENG OVERHEAT light, the Master FIRE WARN lights, and the red fire switch light illuminate. What are the other indications?. The fire warning bell sounds. An Engine BOITLE DISCHARGE light illuminates. The OVHT/DET system annunciator light illuminates. Both A and C.

Fire extinguishers provide a means of extinguishing engine, APU, wheel well and lavatory fires. True. False.

Illumination of the APU DET INOP light will also cause the MASTER CAUTION and OVHT/DET annunciator lights to illuminate. True. False.

Placing the TEST switch in the FAULT/INOP position tests: The engine overheat detectors. The fault detection circuits for both engines and the APU. The APU DET INOP light, FAULT light and APU BOTTLE DISCHARGE light. The APU DET INOP light and engine overheat detectors.

Normally, both detector loops must sense a fire or overheat condition to cause an engine overheat fire alert. True. False.

Pulling up the APU fire warning switch. Discharges the APU fire extinguisher. Trips the generator control relay and generator circuit breaker, arms the associated extinguisher and closes the bleed air valve. Closes the fuel shutoff valve and the APU inlet door, and allows the APU FIRE WARNING switch to be rotated. Both B and C.

The power source for engine fire extinguishing is: Transfer Bus 1. The switched battery bus. The hot battery bus. None of the above are correct.

Prior to performing the Fire/Overheat warning test with the APU operating, ground personnel should be notified. True. False.

The illumination of the Engine/Overheat Detector Fault light indicates both loops on an engine have failed. True. False.

With the OVHT DET switch in the B position. Either A or B detector loops can initiate an overheat or fire warning. Only A or B detector loop can initiate an overheat or fire warning. Only the B detector loop can initiate an overheat or fire warning.

The Engine Fire Extinguisher system contains;. Three freon bottles which can be discharged into both engines and the APU. Two freon bottles whcih can be discharged into either engine. Two freon bottles which can be discharged into both engines and the APU.

The power source for the Engine Overheat and Fire Detection is?. Hot Battery Bus (28V DC). Battery Bus (28V DC). NO.1 Transfer Bus (115V AC).

The power source for the Engine Fire Extingusiher system is?. Battery Bus (28V DC). NO.2 Transfer Bus (115V AC). Hot Battery Bus (28V DC).