(b)
11Q23, AIR SUPPLY APU BLEED CONT
TASK 26-22-02-716-134
6. APU Shutdown Function Check___________________________
A. General
(1) This procedure makes sure the APU Air Intake door is opened and then closed when you pull and release the APU fire switch.
B. References
(1)
AMM 06-42-00/201, Empennage (Major Zone 300) Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power - Control
C. Access
(1) Location Zones
211 Flight Compartment (Left)
212 Flight Compartment (Right)
315 APU Compartment (Left)
316 APU Compartment (Right)
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MAINTENANCE MANUAL
(2) Access Panels
313AL Control Bay Access Door
315AL APU Access Door
316AR APU Access Door
D. Prepare for Check
S 866-135
(1) Supply electrical power (AMM 24-22-00/201).
S 016-136
WARNING: STAY OFF THE SERVICE ACCESS DOOR, 311AL AND THE ELEVATOR
_______ CONTROL ACCESS DOOR, 313AL. YOUR WEIGHT CAN CAUSE THE SPRING-LOADED LATCHES TO RELEASE. IF YOU FALL THROUGH THE DOOR, INJURY CAN OCCUR.
(2)
Open the APU controls bay access door, 313AL (AMM 06-42-00/201).
S 016-137
(3)
Open the APU access doors and install door support rods.
E. Do the APU Shutdown Function Check due to the APU Fire Switch Activation (Fig. 602).
S 866-138
(1) Open this circuit breaker on the E6 rack in the aft equipment center and attach a DO-NOT-CLOSE tag:
(a) E6, APU INLET DR ACT (C1385)
S 866-139
CAUTION: DO NOT PUT THE APU MASTER CONTROL SWITCH TO THE START POSITION.
_______
IF THE APU STARTS, IT CAN CAUSE INJURY TO PERSONS.
(2)
Turn the APU master control switch on the pilots' overhead P5 panel to the ON position.
S 746-140
(3)
Make sure the EICAS message, APU DOOR, shows on the bottom display after 60 seconds.
S 866-141
(4)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the E6 rack:
(a) E6, APU INLET DR ACT (C1385)
(5)
Make sure the APU air intake door opens within 10-35 seconds.
S 746-142
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S 866-143
(6)
Make sure the EICAS message, APU DOOR, does not show on the bottom display.
S 986-144
(7)
Pull the APU fire handle out to the emergency fire position.
NOTE: When you pull the fire handle into the emergency fire
____ position, it is necessary to use the manual fire override switch behind the fire handle.
S 716-145
(8)
Make sure the APU air intake door closes.
S 986-146
(9)
Put the APU master control switch on the pilots' overhead P5 panel to the OFF position.
S 986-147
(10)
Put the APU fire handle to the normal (horizontal) position.
F. Put the Airplane Back to Its Usual Condition
S 986-166
(1) GUN 051 WITH BUS POWER CONTROL UNIT (BPCU) SUNDSTRAND PART NUMBER 734285 OR 734285A; Do the steps that follow:
(a)
Push the RESET button on the BPCU, M116, on the E5-3 rack in the main E/E equipment center.
(b)
Make sure that these messages show on the display: 1) EXTERNAL PWR SYSTEM 2) LEFT GEN POWER SYSTEM 3) RIGHT GEN POWER SYSTEM 4) APU GEN POWER SYSTEM
S 866-151
(2)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel:
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