(2)
SSM 49-11-01, 49-52-01
(3)
AIPC 49-52-03, Fig. 1, AIPC 49-16-00, Fig. 2
B.
Access
(1)
Location Zone
317 APU Compartment-Lower Side of Compressor Case Between Air Inlet Plenum and Compressor Scroll, LH
(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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49-52-03
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
SEE A
1.
FUEL RETURN LINE
2.
FUEL SUPPLY
LINE
3.
NIPPLE
4.
PACKING
FUEL RETURN PORT
17. WASHER
FUEL SUPPLY PORT
5. IGV ACTUATOR
16. BOLT
6. WASHER
18. NUT (4 LOCATIONS)
7. ELECTRICAL
15. CONNECTOR CONNECTOR, P17
ROD
8.
NUT (4 LOCATIONS)
9.
NIPPLE
DRAIN PORT
FWD
10.
DRAIN LINE
11.
PACKING ROD
12.
ACTUATOR
A
Inlet Guide Vane Actuator Installation
Figure 401
G57228
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b)
Open the APU access doors.
(c)
Engage the support rods for the APU access doors.
S 024-035
(4)
Remove the IGV actuator (5):
(a)
Disconnect the P17 electrical connector (7) from the IGV actuator (5). 1) Install caps on the connector (7) and the receptacle to
prevent contamination.
(b)
Disconnect the fuel supply line (2) and the return line (1) from the IGV actuator (5). 1) Install caps on the lines (1 and 2) to prevent
contamination.
(c)
Loosen the fuel supply line (2) and the return line (1) at the tee connectors.
(d)
Turn the lines (1 and 2) until they point down.
(e)
Disconnect the flexible drain line (10) from the IGV actuator (5). 1) Install a cap on the drain line (10) to prevent
contamination.
(f)
Remove the nut (18), the washers (17), and the bolt (16) that attach the actuator rod (12) to the connector rod (15).
(g)
Remove the nuts (8) and the washers (6) that connect the IGV actuator (5) to the compressor case.
(h)
Remove the IGV actuator (5).
S 034-037
(5)
Remove the nipples from the IGV actuator (5):
(a)
Remove the nipples (3) from the IGV actuator (5) housing. 1) Remove and discard the packings (4).
(b)
Remove the nipple (9) from the IGV actuator (5) housing. 1) Remove and discard the packing (11).
(c) 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 機載輔助動力 2(83)
