S 866-018
(12)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P83 Panel, E8 Aft Equipment Center 1) APU PRIMARY CONT
(b)
P6 Main Power Distribution Panel 1) 6K18 APU ALTN CONT
S 866-019
(13) Remove the DO-NOT-OPERATE tag from the APU control switch on the P5 panel.
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A
747-400 MAINTENANCE MANUAL
S 716-020
(14)
Turn the APU control switch to OFF to close the inlet door.
(a)
Make sure the door goes back to the initial aligned position with no interference.
S 716-021
(15)
Open and close the inlet door two more times with APU control switch.
(a)
Make sure the door operates smoothly without interference.
S 826-022
(16)
If it is necessary to correct the tightness at the hinges and the clevis, do these steps:
(a)
Remove the air inlet door (Ref 49-15-03/401).
(b)
Examine and repair the hinges and the pins as shown in Fig. 601.
(c)
Install the air inlet door (Ref 49-15-03/401).
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747-400 MAINTENANCE MANUAL
AIR INLET DOOR ACTUATOR - REMOVAL/INSTALLATION
______________________________________________
1. General_______
A. This procedure contains the tasks to remove and install the actuator for the air inlet door.
B. The actuator for the air inlet door is on the air inlet duct. The rod end of the actuator is connected to the air inlet door. The terminal end of the actuator is connected to the actuator container.
C. The access cover for the manual override is on the lower side of the actuator container. The actuator container is installed on the air inlet duct.
D. You can get access to the actuator container through the APU access doors.
TASK 49-15-04-004-001
2. Air Inlet Door Actuator Removal (Fig. 401)_______________________________
A. References
(1)
WDM 49-15-11
(2)
SSM 49-11-01, 49-15-01
(3)
IPC 49-15-04 Fig. 1
B.
Access
(1)
Location Zone 318 APU Compartment-Forward Side of Air Inlet Duct, RH
(2)
Access Panel
317AL APU Access Door
318AR APU Access Door
C.
Procedure
S 864-002
(1)
Make sure the APU control switch on the P5 panel is OFF and attach a DO-NOT-OPERATE tag.
S 864-003
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6 Main Power Supply Panel
1) 6K18 APU ALTN CONT
(b)
P83 Panel, E8 Aft Equipment Center
1) APU PRIMARY CONT
S 014-004
(3)
Open the APU access doors:
(a)
Open the latches on the APU access doors.
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A
747-400 MAINTENANCE MANUAL
A SEE A
A
1. LINK POSITION SWITCH
FOR THE AIR INLET DOOR AIR INLET DOOR(REF) (OPEN) (REF)
SEE B
SEE C
5. ACTUATOR CONTAINER
4. ELECTRICAL PLUG DM83
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