747-400 AMM 飞机维护手册 EXHAUST 1(42)

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 (1)  Do these steps to remove the hold-open rod which holds the applicable thrust reverser in the open position:
 NOTE: For safety, you must close each thrust reverser half
____ independently. Remove only one hold-open rod, and close only one thrust reverser half at a time.
 (a)  Operate the hand pump to pressurize the cowl opening system in the fully open direction.
 NOTE: This usually will remove the load from the hold-open rod
____ until you can release it from its bracket. But, if it is installed in the bracket at the 45-degree position, a load will remain on the hold-open rod. For this condition, carefully push up on the thrust reverser while you release the end of the hold-open rod from the bracket.
 (b)  
Disengage the end of the hold-open rod from the bracket on the fan case (Fig. 203).

 (c)  
Do the steps that follow to retract the hold-open rod:

 1)  HOLD-OPEN RODS WITH THE LATCH; Push on the latch release handle and retract the hold-open rod.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
2)  HOLD-OPEN RODS WITH THE LOCK SLEEVE AND BALL LOCKPIN; Do these steps: a) Remove the ball lockpin and put it in the stowage
 bracket.
 b)  Move the lock sleeve until you can see the red band (with the word UNLOCKED on it), then retract the hold-open rod.
 3)  HOLD-OPEN RODS WITH THE LOCK SLEEVE AND SECONDARY LOCK; Do these steps: a) Push on the secondary lock to release the lock. b) Move the lock sleeve until you can see the red band
 (with the word UNLOCKED on it), then retract the
 hold-open rod.
 (d)  Put the hold-open rod in the stowage bracket on the thrust reverser.
 S 412-022-N00
 CAUTION: MAKE SURE THE V-FLANGE OF THE THRUST REVERSER GOES INTO THE
_______ V-GROOVE ON THE ENGINE WHEN YOU CLOSE THE THRUST REVERSER. IF THE V-FLANGE DOES NOT ALIGN CORRECTLY WITH THE V-GROOVE, DAMAGE TO THE ENGINE OR THE THRUST REVERSER CAN OCCUR.
 (2)  Slowly open the return valve on the hand pump.
 NOTE:____Each thrust reverser half must be closed independently. If the opposite thrust reverser half is open, continue to hold it in the open position (with its hold-open rod) while you close the first thrust reverser half. When you open the return valve on the hand pump, hydraulic pressure in the cowl opening system is released. This will lower the thrust reverser to the closed position.
 S 022-023-N00
 (3)  Disconnect the hand pump from the pressure manifold on the bottom of the thrust reverser (Fig. 202).
 NOTE: Make sure you install the dust cap on the pressure manifold
____
 after you remove the hand pump.

 S 412-024-N00
 (4)  If it is necessary, do the steps (above) again to close the opposite thrust reverser half.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 412-025-N00
 CAUTION: MAKE SURE THE T-BOLT IS CORRECTLY ENGAGED IN THE RECEIVER OF
_______ THE VEE-GROOVE LATCH BAND BEFORE YOU CLOSE THE T-BOLT LATCH HANDLE. FAILURE TO OBEY THIS INSTRUCTION CAN CAUSE DAMAGE TO THE T-BOLT OR THE RECEIVER ON THE VEE-GROOVE LATCH BAND.
 (5)  
Close the T-bolt latch handle to lock the vee-groove latch band around the thrust reverser (Fig. 201).

 S 412-026-N00

 (6)  
Close the four tension latches on the bottom of the engine.

 NOTE: Start with the front tension latch on the torque box and
____ continue aft until you close all four tension latches.
 S 412-027-N00
 (7)
Close the louvered exhaust door on the bottom of the engine.

 G.
Put the Airplane Back to Its Usual Condition

 S 412-028-N00
 (1)  
Close the core cowl panels (AMM 71-11-06/201).

 S 412-029-N00

 (2)  
Close the fan cowl panels (AMM 71-11-04/201).
　
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