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
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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.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
A
EVENER BAR ASSY
A
FRONT ENGINE MOUNT
Engine Mount Wear Limits
Figure 601 (Sheet 1)
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EVENER BAR ASSY
B-B
Engine Mount Wear Limits
Figure 601 (Sheet 2)
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////////////////////////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
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本文链接地址：747-400 AMM 飞机维护手册 动力装置 POWER PLANT 2(93)
