S 012-006
(6)
Do the procedure to remove the forward fairing (AMM 54-62-04/401).
S 392-007
(7)
For the electrical power feeder, do the steps that follow to apply sealant:
(a) Do the steps that follow where the systems go through the midspar web of the strut, above the systems reaceway: 1) Use a thin rectangular nozzle to apply BMS 5-63 fillet seal
between individual wires on unsleeved bundles and around sleeved bundles (AMM 51-31-01/201, Fillet Seal Application Task).
2) Fill the gaps between the wire bundles and the rubber block with BMS 5-63 (AMM 51-31-01/201).
3) Apply BMS 5-63 fillet seal around the entire area where the systems go through the midspar web (AMM 51-31-01/201, Fillet Seal Application Task).
4) Apply BMS 5-63 fillet seal all around the seal block and to the fasteners of the seal block (AMM 51-31-01/201, Fillet Seal Application Task).
(b) At the midspar bulkhead, where the systems go through the bulkhead, seal the bulkhead seal fitting (AMM 51-31-01/201, Electrical Fitting Sealing Task).
S 792-008
(8) Do the strut leak test for the systems raceway (AMM 54-53-00/201)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
54-53-01
ALL ú ú 01 Page 204 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 792-013
(9)
Do the strut leak test procedure for the bulkhead (AMM 54-53-00/201).
S 412-009
(10)
Do the procedure to close the applicable access doors (AMM 54-62-00/201)
S 412-021
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(11)
Close the left thrust reverser (AMM 78-31-00/201).
S 412-023
(12)
Close the left core cowl panel (AMM 71-11-06/201).
S 412-024
(13)
Close the left fan cowl panel (AMM 71-11-04/201).
S 442-025
(14)
Do the activation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
54-53-01
ALL ú ú 01 Page 205 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FAIRINGS AND SKINS - DESCRIPTION AND OPERATION
______________________________________________
1. General_______
A. The nacelle struts load bearing side panel assemblies consist of a bonded skin and doubler with a local tripler in the area by the rear engine mount.
B. The interior side of the skin below the lower spar (firewall) is covered with a stainless steel sheathing for a fire barrier.
C. Fairings cover the skin at locations where necessary to provide for smooth aerodynamic flow.
D. For desciption of fairings, refer to 54-61-00/001.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
54-60-00
ALL ú ú 01 Page 1 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1.
2.
3.
4.
5.
A
747-400 MAINTENANCE MANUAL
FAIRINGS - DESCRIPTION AND OPERATION
____________________________________
General (Fig. 1)
_______
A. Fairings are attached to the strut to provide a low-drag aerodynamic profile between the engine nacelle and wing.
B. Fairings attached to the nacelle strut include the forward fairings, thrust reverser-to-strut fairings, underwing fairing and skirt beam, core cowl skirt, lower strut fairings, trailing edge fairing doors, and the aft fairings.
C. For description of the trailing edge fairing doors, refer to 54-62-00/001.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 NACELLES/PYLONS(86)
