Forward Lower Engine Mount Installation
Figure 401 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A76362
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
B. Parts ~.............................................................................. | AMM | | AIPC | ................ ................................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Washer | 71-21-01 | 01 | 35 | | | 2 | Bolt | | | 30 | | | 3 | Mount Assy-Fwd | | | 40 | | | 4 | Nut | | | 25 | | | 5 | Washer - Special | | | 20 | | | 6 | Washer | | | 15 | | | 7 | Bolt-Shoulder | | | 10 | 2.....…........…................................…..............…......…........1
 C. References
 (1)
AMM 70-21-00/201, Standard Practices

 (2)
AMM 71-00-02/401, Power Plant

 (3)
IPC 71-21-01 Fig. 1

 D.
Access

 (1)  
Location Zone
 412 Engine 1
 422 Engine 2
 432 Engine 3
 442 Engine 4

 E.
Procedure

 S 214-012-N00
 CAUTION: MAKE SURE THE SPACER IS IN THE CORRECT POSITION IN THE BEARING
_______ HOUSING BEFORE YOU INSTALL THE ENGINE MOUNT ASSEMBLY ON THE ENGINE. IF THE SPACER IS NOT THERE, DAMAGE TO THE ENGINE MOUNT CAN OCCUR.
 (1) Make sure the spacer is in the correct position in the bearing housing before you install the engine mount on the engine.
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S 824-011-N00
 (2)  Align the engine mount (3) on the engine.
 S 424-006-N00
 (3)  Attach the bearing housing to the engine case flange with the bolts (2) and washers (1). (a) With the torque wrench, tighten the bolts (2) to 1710-2090 pound-inches (193.2-236.2 newton-meters). (b) Install the lockwire on the bolts (2).
 S 434-007-N00
 (4)  Install the thrust links to the engine case flange with bolts (7), washers (5 and 6), and nuts (4). (a) Make sure the run-on torque of the nut (4) is 50-400 pound-inches (5.6-45.2 newton-meters). 1) If the run-on torque of the nuts (4) is not 50-400 pound-inches (5.6-45.2 newton-meters), replace the nuts. (b) While you hold the bolts (2), tighten the nut (4) to 650-750 pound-inches (73.5-85.8 newton-meters). (c) Install the cotter pin (AMM 70-21-00/201). (d) Apply the sealant to the two ends of the cotter pin to prevent movement.
 S 414-009-N00
 (5)  Install the power plant (AMM 71-00-02/401).

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AFT LOWER ENGINE MOUNT - REMOVAL/INSTALLATION
_____________________________________________
 1.  General
_______
 A.  This procedure gives the instruction for the removal and installation of the aft lower engine mount.
 B.  The aft lower engine mount is attached to the two flanges on the aft turbine case of the engine. You can get an access to the mount after you remove the engine.
 TASK 71-21-02-004-001-N00
 2.  Remove the Aft Lower Engine Mount (Fig. 401)
_________________________________
 A.  References
 (1)  
AMM 71-00-02/401, Power Plant

 (2)  
AMM 78-11-01/401, Turbine Exhaust Sleeve

 (3)  
IPC 71-21-02 Fig. 1

 B.  
Access

 (1)  
Location Zone
 412 Engine 1
 422 Engine 2
 432 Engine 3
 442 Engine 4
　
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