*
APU fire extinguishing bottle
*
Cargo compartment fire extinguishing bottles
*
Cargo compartment fire extinguishing flow valves.
The test makes sure that there are no open circuits in the engine and APU fire extinguishing squibs and their related wiring.
Training Information Point
NOTE: When you do either test, keep persons away from the cargo compartments, engines, and APU. Each test supplies power to all the squibs in the airplane.
When you do either test, the ELMS supplies a small current to all the squibs in the airplane. The MAT shows the test results only for the selected test. See Fire Protection -Squib Test -Functional Description in this section for more information.
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FIRE PROTECTION -SYSTEM TESTS
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FIRE PROTECTION -OPERATIONAL TESTS
General
These are the operational tests for the fire extinguishing system:
*
Cargo squibs
*
Engine and APU squibs.
Cargo Squibs
WARNING: KEEP PERSONS AWAY FROM THE CARGO COMPARTMENT DURING THIS TEST. IF A SQUIB FIRES ACCIDENTALLY, THE FIRE BOTTLE CAN RELEASE ITS CONTENTS AND CAUSE INJURIES.
This test supplies a small current to these squibs:
*
Cargo compartment fire extinguishing bottles
*
Cargo compartment fire extinguishing flow valves
*
Engine fire extinguishing bottles
*
APU fire extinguishing bottle.
The test makes sure that there are no open circuits in the cargo compartment fire extinguishing squibs and their related wiring.
LLAR Bottle Squib
WARNING: KEEP PERSONS AWAY FROM THE LOWER LOBE ATTENDANTS REST COMPARTMENT DURING THIS TEST. IF A SQUIB FIRES ACCIDENTALLY, THE FIRE BOTTLE CAN RELEASE ITS CONTENTS AND CAUSE INJURIES.
EFFECTIVITY
BEJ ALL
This test supplies a small current to these squibs:
*
Engine fire extinguishing bottles
*
APU fire extinguishing bottle
*
Cargo compartment fire extinguishing bottles
*
Cargo compartment fire extinguishing flow valves.
The test makes sure that there is no open circuit in the LLAR bottle squib and its related wiring.
Engine and APU Squibs
WARNING: KEEP PERSONS AWAY FROM THE ENGINE AND APU DURING THIS TEST. IF A SQUIB FIRES ACCIDENTALLY, THE FIRE BOTTLE CAN RELEASE ITS CONTENTS AND CAUSE INJURIES.
This test supplies a small current to these squibs:
*
Engine fire extinguishing bottles
*
APU fire extinguishing bottle
*
Cargo compartment fire extinguishing bottles
*
Cargo compartment fire extinguishing flow valves.
The test makes sure that there are no open circuits in the engine and APU fire extinguishing squibs and their related wiring.
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FIRE PROTECTION -OPERATIONAL TESTS
Training Information Point
When you do any test that does a check of fire bottle squibs, the ELMS supplies a small current to fire bottle squibs for the bottles selected and to all other fire bottle squibs. The MAT shows the test results only for the selected test. See Fire Protection -Squib Test -Functional Description in this section for more information.
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FIRE PROTECTION -OPERATIONAL TESTS
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FIRE PROTECTION -TRAINING INFORMATION POINT -FIRE/OVERHEAT TEST
General
The fire and overheat test switch (FIRE/OVHT TEST) does a test of these systems:
*
Engine fire detection
*
APU fire detection
*
Lower cargo compartment smoke detection
*
Wheel well fire detection.
Fire/Overheat Test
Push and hold the fire/overheat test switch. Make sure these indications come on:
*
APU fire warning light
*
Forward cargo fire warning light
*
Aft cargo fire warning light
*
Master warning lights
*
Fire aural warning
*
Engine fuel control switch fire warning lights
*
Left and right engine fire warning lights
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