(4)
AMM 78-31-00/201, Thrust Reverser System

 (5)
AMM 78-31-08/401, Thrust Reverser Opeining Flex Hoses

 (6)
IPC 78-31-06 Fig. 5

 B.  
Access

 (1)  
Location Zones 415 and 416 Engine 1 - Thrust Reverser Halves 425 and 426 Engine 2 - Thrust Reverser Halves 435 and 436 Engine 3 - Thrust Reverser Halves 445 and 446 Engine 4 - Thrust Reverser Halves

 (2)  
Access Panels
 413 and 414 Fan Cowl Panels - Engine 1
 417 and 418 Core Cowl Panels - Engine 1
 423 and 424 Fan Cowl Panels - Engine 2
 427 and 428 Core Cowl Panels - Engine 2
 433 and 434 Fan Cowl Panels - Engine 3
 437 and 438 Core Cowl Panels - Engine 3
 443 and 444 Fan Cowl Panels - Engine 4
 447 and 448 Core Cowl Panels - Engine 4
 451A No. 2 Forward Fairing - Engine 1
 461A No. 2 Forward Fairing - Engine 2
 471A No. 2 Forward Fairing - Engine 3
 481A No. 2 Forward Fairing - Engine 4

 C.  
Prepare to Do a Check of the Flex Hoses (Fig. 601).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
SEE A
FLEX
HOSE

THRUSTREVERSER OPENING ACTUATOR
CLAMP
RIGHT SIDE SHOWN (LEFT SIDE OPPOSITE)
A
Thrust Reverser Cowl Opening Flex Hose Figure 601
//////////////////////// / PW4000 SERIES / / ENGINES / ////////////////////////
FWD
E45824
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S 046-012-N00

 WARNING:_______ DO THE DEACTIVATION PROCEDURE FOR THE SPEEDBRAKE CONTROL
 SYSTEM.  IF YOU DO NOT DO THIS, THE AUTOMATIC SPEEDBRAKES CAN
 MOVE QUICKLY WHEN YOU MOVE THE THRUST LEVERS.  THIS CAN CAUSE

 INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
Do the deactivation procedure for the Speedbrake Control System (AMM 27-62-00/201).

 S 866-014-N00

 (2)  
Make sure the forward thrust levers are in the idle position and attach the DO-NOT-OPERATE tags.

 S 866-015-N00

 (3)  
Make sure the reverse thrust levers are in the fully stowed position and attach the DO-NOT-OPERATE tags.

 S 046-016-N00 WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (4)  
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).

 S 016-017-N00

 (5)  
Open the fan cowl panels (AMM 71-11-04/201). S 016-018-N00

 (6)  
Open the core cowl panels (AMM 71-11-06/201).

 S 016-011-N00 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (7)  Open the thrust reversers (AMM 78-31-00/201).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 216-026-N00
 (8)  Do these steps to examine the flex hoses.
 (a)
Examine the flex hoses for damage or rubbed areas.

 (b)  
Examine the hoses and hose fittings for leakage.

 NOTE: Be very careful to examine the areas around the flex
____ hose connections, clamps and fittings. Look for liquid on the external side of each flex hose. Also look for the drops of liquid that fell off on the components below each flex hose.
　
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