Max Fire Protection Flashcards
Which areas of the aircraft have fire extinguishing capability
- Engines (overheat and fire detection)
- APU fire
- Lower Cargo Compartments (smoke/fire)
- Lavatories (smoke/fire)
- Main wheel well (fire)
What fire protection functions are available without battery power?
None.
Detection requires DC Battery Bus (Engines and APU) or DC Bus 1 & 2 (Lower Cargo Compartment)
Protection requires DC Hot Battery Bus
Can you discharge the fire bottles using only battery power?
Yes
How is the fire warning bell silenced?
Pushing either BELL CUTOUT or FIRE WARN will:
* extinguish both FIRE WARN lights
* silence the fire warning bell
* reset the system for future warnings
* silence the remote APU fire warning horn
How is an engine fire extinguished?
Two engine fire extinguisher bottles
Each containing halon with a nitrogen precharge, located in the left main wheel well. Either or both engine fire extinguisher bottles can be discharged into either engine
Engine fire extinguishing is powered by the hot battery bus.
Which systems are affected by pulling an engine fire switch and how are they affected?
- Closes both associated engine fuel shutoff valve and spar fuel shutoff valve
- Closes associated engine bleed air valve and onside pack valve
- Closes the associated hydraulic fluid shutoff valve
- Trips the associated generator control relay and breaker
- Disables thrust reverser for related engine
- Arms one discharge squib on each engine fire extinguisher bottle
- Allows the engine fire switch to be rotated for discharge
NOTE: The systems affected by pulling an engine fire switch are a lighter gray color on
the forward overhead panel (Fuel, Electrical, Hydraulic, Air).
How is a dual loop failure of an Engine Fire Detection System indicated?
A FAULT light will illuminate in the event of a dual loop failure.
How many fire extinguishing bottles are provided for the APU?
1 halon bottle precharged with nitrogen, located near the APU.
Does the APU have automatic fire extinguishing?
No
What happens when pulling the APU fire switch?
- provides a backup to the automatic shutdown feature
- closes the APU fuel shutoff valve
- closes the APU bleed air valve
- closes the APU air inlet door
- trips the APU generator control relay and breaker
- allows the APU fire switch to be rotated for discharge
- arms the APU fire extinguisher bottle squib
Rotating the APU fire switch in either direction will electrically fire the squib, discharging the halon into the APU.
Where is the APU Fire Ground Control panel located?
Right main wheel well.
What does placing the fire detection TEST switch to FAULT/INOP test?
Tests the system’s ability to detect a fault or inoperative equipment within itself.
The indications of a successful FAULT/INOP test are:
* both MASTER CAUTION lights illuminate
* OVHT/DET System Annunciator light illuminates
* FAULT light illuminates
* APU DET INOP light illuminates
The absence of any of these lights indicates a failed test
What does placing the fire detection TEST switch to OVHT/FIRE test?
Tests overheat and fire detection loops on both engines, the fire loop on the APU, and the fire detector in the wheel well.
The indications of a successful OVHT/FIRE test are:
* fire warning bell sounds
* both master FIRE WARN lights illuminate
* both MASTER CAUTION lights illuminate
* OVHT/DET System Annunciator light illuminates
* both ENG OVERHEAT lights illuminate
* both engine fire switches illuminate
* both engine start switchesD illuminate
* the APU fire switch illuminates
* the WHEEL WELL light illuminatesD
* the wheel well APU fire warning horn sounds and the wheel well APU fire warning light flashes (if on the ground)
What is indicated by the illumination of the DETECTOR FAULT light on the CARGO FIRE panel?
One or more detectors in the Lower Cargo Compartment Fire Detection System has failed.
What fire protection and extinguishing equipment is available in the lower cargo compartments?
A shared system of fire suppressing chemical agent.
2 Halon bottles, 195 min total
Smoke detectors in a dual-loop configuration.
