(c)  
Operate the rods (extend and retract the rods) to flush the dirt, the oil, or the grease from the rods and the lock devices.

 (d)  
Dry the rods and the lock devices with a clean cloth.

 (e)  
Make sure the rods and the lock sleeves operate correctly.

 (f)  
Do not lubricate the rods or the lock devices.

 S 112-013-N00
 (4)  
Do these steps to clean the hold-open rods on the core cowl panels
 and on the thrust reversers:

 (a)  
To clean the hold-open rods for the core cowl, open the core cowl panels (AMM 71-11-06/201).

 (b)  
Make sure the rods are extended and locked.

 (c)  
Apply a large quantity of the solvent to the rods and to the latches.

 (d)  
Operate the rods and the latches (extend and retract the rods) to flush the dirt, the oil, or the grease from the rods.

 (e)  
Dry the latches and the rods with a clean cloth.

 (f)  
Make sure the rods and the latches operate correctly.

 (g)  
Do not lubricate the rods or the latches.

 (5)  
Close the core cowl panels (AMM 71-11-06/201).

 S 412-014-N00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(6)  S 442-015-N00Do the activation procedure for the thrust reverser (AMM 78-31-00/201).
 (7)  S 412-016-N00Close the fan cowl panels (AMM 71-11-04/201).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ENGINE MOUNTS - DESCRIPTION AND OPERATION
_________________________________________
 1.  General
_______
 A.  The forward and aft lower engine mounts hold the engine and are attached at six locations. The forward lower engine mount is attached to the rear flange of the intermediate case at three locations. The aft lower engine mount is attached to the top of the double flange on the turbine exhaust case and at locations approximately 35 degrees on one of the sides of the centerline. The lower engine mounts are made to move engine thrust and absorb vertical, side, and torsion loads. The lower engine mounts permit axial and radial growth for expanded areas which are caused by increases in temperature.
 2.  Forward Lower Engine Mount (Fig. 1)
__________________________
 A.  The forward lower engine mount holds the engine at three locations; a bearing shear fitting and two thrust links. The bearing shear fitting is installed into a mating hole in the rear flange of the intermediate case and held by four bolts. The two thrust links are attached to the rear flange of the intermediate case on one of the two sides of the bearing shear fitting and to the aft end of the mount assembly. The forward lower engine mount attaches to the strut with four vertical tension bolts and a shear pin.
 3.  Aft Lower Engine Mounts (Fig. 1)
_______________________
 A.  The aft lower engine mount holds the engine at three locations on the double flange of the turbine exhaust case. The aft lower engine mount is made of two tangential links and a center link which attach to a common mount fitting. The mount fitting attaches to the strut with four vertical bolts and two shear pins.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
FORWARD UPPER 
BEARING  ENGINE MOUNT 
SHEAR  SEE  A 
FITTING 
SEE  B 
ENGINE 
　
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