Fire Protection / Warming System Flashcards
Fire detection and extinguishing systems are located at which of the following areas?
- Engines, APU, Lavatories, Cargo Compartments
The _________ powers engine overheat and fire detection:
- battery bus
What happens when the engine fire warning switch is pulled up?
- Closes fuel, hydraulic shutoff, and engine bleed air valves
- Disables the reverser, trips the respective generator control circuit breaker, and deactivates the enginedriven
hydraulic pump.
When the FAULT/INOP and OVHT/FIRE TEST Switch is placed in the OVHT/FIRE position, should the FAULT
light illuminate?
- No
If you are on the ground, what additional indications of an APU fire occur?
- the wheel well APU fire warning horn sounds
The APU ground control panel contains an APU fire warning light, an APU BOTTLE DISCHARGE switch, an APU
fire control handle, and an APU HORN CUTOUT switch and is located in the __________ .
- main wheel well
The Cargo Compartment Fire Suppression System contains how many fire extinguisher bottle(s)?
- two
What should happen when pushing the Cargo Fire TEST Switch?
- both Extinguisher (EXT) Test Lights should illuminate green
If the Overheat Detector Select (OVHT DET) switches is in the NORMAL position, _______.
- detection loop A and B are active
The ______light illuminates when both loops in one or both cargo compartments have failed?
- DETECTOR FAULT
If the Cargo Fire Bottle Discharge (DISCH) light is illuminated (amber), what does it mean?
- indicates either extinguisher bottle has discharged
What happens on the B737-800, after the Cargo Fire System is armed, if the Cargo Fire Discharge (DISCH)
Switch is pushed, and the first extinguisher bottle is discharged.
- A timer is then set for 60 minutes to discharge the second bottle.
When smoke is detected in the lavatory, what is the flight deck indication?
- There is no flight deck indication
The Lavatory Fire Extinguisher would indicate what color to indicate that the Heat Activated Nozzle has been
discharged?
- Aluminum
With the If the OVHT DET switch is in normal and one engine overheat and fire detection loop fails, what
happens?
- the failed loop is automatically deactivated and the remaining loop functions as a single loop detector
What does an illuminated amber FAULT light on the overheat fire protection panel indicate with the OVHT
DET switch in normal?
- both detector loops for an engine have failed
What does an illuminated amber FAULT light on the overheat fire protection panel indicate with the OVHT
DET switch selected to A?
- the A detector loop for an engine has failed
A _____ has occurred if both MASTER CAUTION lights, the OVHT/DET system annunciator light, and the
related ENG OVERHEAT light illuminate.
- An engine overheat
The indications of an engine fire are:
- All related engine overheat alert indications illuminate
- The fire warning bell sounds, both master FIRE WARNING lights illuminate, the related engine fire
warning switch illuminates
The engine fire warning switches are unlocked by?
- Illumination of an engine fire warning switch, illumination of an ENG OVERHEAT light, or manually by
pushing the fire warning switch override
What occurs to the engine fuel system when pulling the engine fire warning switch up?
- closes both the engine fuel shutoff valve at the HMU and the spar fuel shutoff valve
What occurs to the respective hydraulic system when pulling the engine fire warning switch up?
- closes the hydraulic fluid shutoff valve and deactivates the engine driven hydraulic pump LOW
PRESSURE light
When the Fire Warning BELL CUTOUT Switch is pushed it extinguishes both master FIRE WARN lights, silences
the fire warning bell and ___________.
- resets system for additional warnings
When positioning the EXT TEST Switch to 1 or 2, circuit continuity from the squib to __________ is verified.
- both engines and APU fire switches
What happens when placing the Fault/Inoperative (FAULT/INOP) and Overheat/Fire (OVHT/FIRE) TEST
Switch to the FAULT/INOP position?
- tests the fault detection circuits for both engines and the APU
What happens when placing the Fault/Inoperative (FAULT/INOP) and Overheat/Fire (OVHT/FIRE) TEST
Switch to the OVHT/FIRE position?
- tests overheat and fire detection loops on both engines and APU, and wheel well fire detector
What happens when there is an illuminated APU Fire Warning Switch, in the down position?
- unlocks the APU fire warning switch
What happens when there is an illuminated APU Fire Warning Switch, in the down position?
- unlocks the APU fire warning switch
_____lights will illuminate during a number 1 engine overheat?
- ENG 1 OVERHEAT, MASTER CAUTION, and OVHT/DET system annunciator