(a) Make sure that these lights decrease in intensity: 1) The APU fire switch 2) The two FIRE WARN lights
S 865-128
(9) Move the LIGHTS switch on the P2-1 panel to the BRIGHT position.
(a) Make sure these lights go back to their usual intensity. 1) The APU fire switch 2) The two FIRE WARN lights
S 865-129
(10) Release the TEST switch on the P8-1 panel.
E. Do a test of the fire bell, horn and fire warning circuitry.
S 865-130
(1)
Hold the TEST switch, on the P8-1 panel, to the OVHT/FIRE position.
S 865-131
(2)
Push and release the BELL CUTOUT switch on the P8-1 panel.
NOTE: The results are the same, wether you push the BELL CUTOUT
____ switch, either FIRE WARN switch on the P7 panel, or the HORN CUTOUT switch on the P28 panel.
(a) Make sure that the fire bell and horn make no sound.
NOTE: The fire warning light on the APU Ground Contorl Panel,
____ P28, should stay on continuously after the bell and horn stop making noise.
(b) Make sure that the FIRE WARN lights on the P7 panel go off.
S 865-132
(3) Release the TEST switch on the P8-1 panel.
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S 865-133
(4) Push and hold the AIR SENSING switch on the E11 shelf, or pull down the squat switch at the right main landing gear.
(a) Make sure the AIR SENSING ON IN AIR indicator on the E11 shalf is on.
S 865-134
(5) Hold the TEST switch on the P8-1 panel to the OVHT/FIRE position.
(a)
Make sure the fire warning light in the main wheel well flashes.
(b)
Make sure the warning horn for the APU does not make a sound.
S 865-135
(6) Push and release the HORN CUTOUT switch on the P28 panel.
(a) Make sure the fire warning light in the main wheel well comes on continuously.
S 865-136
(7) Release the switches that follow:
(a)
The TEST switch on the P8-1 panel.
(b)
The squat switch on the main landing gear or the AIR SENSING switch on the E11 panel.
F. Put the airplane back to its usual condition.
S 865-032
(1) Close this circuit breakers on the P6-2 panel:
(a) OVHT WHL WELL WNG BDY
S 865-033
(2) Remove electrical power if it is no longer necessary (AMM 24-22-00/201).
TASK 26-15-00-715-034
3. Do the APU Fire Detection System Test_____________________________________
A. Equipment
(1) Test Box - C26002-21
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(2)
Cable Assembly C6002-4
(3)
Cable Assembly C6002-25
(4)
Multimeter
B. References
(1) AMM 24-22-00/201, Manual Control
C. Access
(1) Location Zones
101 Control Cabin - Left
102 Control Cabin - Right
205 Electronic Compartment
217 Right Main Wheel Well
703 APU Compartment
D. Prepare to do the System Test
S 865-035
(1)
Supply electrical power (AMM 24-22-00/201).
S 035-036
(2)
Remove the APU cowl door.
S 865-093
(3)
Make sure that these circuit breakers on the P6 panel are open:
(a)
FIRE PROTECTION DETECTION, APU
(b)
MASTER WARNING AND CONTROL
S 865-037
(4) Make sure that this circuit breaker on the P6 panel is closed:
(a) LANDING GEAR, LIGHTS
S 865-038
(5) Open these circuit breakers on the P6-2 panel:
(a)
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