EVENER BAR
FWD
FORWARD LOWER
ENGINE MOUNT
AFT LOWER
ENGINE MOUNT
THRUST LINK
(2 LOCATIONS)
ENGINE TURBINE
CASE FLANGE
A
HANGER
ASSEMBLY
TANGENTIAL LINK
(2 LOCATIONS)
CENTER LINK
FWD
B
Engine Mounts
Figure 1
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-21-00
ALL ú ú N01 Page 2 ú Feb 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ENGINE MOUNTS - INSPECTION/CHECK
________________________________
1. General
_______
A. This procedure gives the task to examine the lower engine mounts. This procedure also contains the wear limits for the attach points on the engine mounts.
TASK 71-21-00-206-001-N00
2. Lower Engine Mount Inspection
_____________________________
A. References
(1)
AMM 71-00-02/401, Power Plant
(2)
AMM 71-21-01/401, Forward Lower Engine Mount
(3)
AMM 71-21-02/401, Aft Lower Engine Mount
B.
Access
(1)
Location Zone
412 Engine 1
422 Engine 2
432 Engine 3
442 Engine 4
C.
Procedure
S 026-002-N00
(1)
Remove the power plant (AMM 71-00-02/401).
S 216-003-N00
(2)
Examine the lower engine mounts for these signs of damage.
(a) Rust color
NOTE: Rust color on the lower engine mount is a sign of
____ corrosion or cracks.
(b)
Cracks 1) No cracks are permitted. 2) If you can see cracks, do the applicable task: "Forward
Lower Engine Mount Removal" (AMM 71-21-01/401) or "Aft Lower Engine Mount Removal" (AMM 71-21-02/401).
(c)
Dents and scratches on the surfaces of the lower engine mounts.
(d)
Fretting
NOTE: Fretting is caused when two adjacent pieces of metal
____
rub.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-21-00
ALL ú ú N01 Page 601 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
A
EVENER BAR ASSY
A
FRONT ENGINE MOUNT
Engine Mount Wear Limits
Figure 601 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-21-00
ALL ú ú N01 Page 602 ú Feb 10/89
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
EVENER BAR ASSY
B-B
Engine Mount Wear Limits
Figure 601 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-21-00
ALL ú ú N01 Page 603 ú Feb 10/89
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SHEAR PIN15
D C C D
AFT ENGINE MOUNT
B
D D
22 16 21 23 CENTER LINK 20
16
17
ASSEMBLY HANGER 22 19 23 21 18 17 BEARING
C-C
ASSEMBLY HANGER 30 31 26 28 32 LINK TAGENTIAL 33 24
25
31 30 29 32 27
D-D BEARING
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 動力裝置 POWER PLANT 2(93)
