S 034-048

 (3)  
Remove the sleeve (44) and packing (45) from the modulating valve.

 (a)  
Discard the packing (45).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 36-12-04-404-061
 5. Install the Air Filter for the Fan Air Modulating Valve
_______________________________________________________
 A. Consumable Materials
 (1)  D01062, Never-Seez, Pure Nickel Special, NSBT-8N (High temperature anti-seize compound)
 B. Parts
 (1)  Refer to the table that follows:
 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 41 | Packing | 36-12-01 | 01 | 265 | | | 43 | Filter | | | 275 | | | 45 | Packing | | | TBD | 2.......….......…...................................…...........….....…........1
 C. References
 (1)  
AMM 54-61-00/001, Fairings - Description and Operation

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 71-11-04/201, Fan Cowl Panels

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

 D. Access
 (1)  
Location Zone - Method 1 412 Engine 1 - Compressor Case 12:00 o'clock 422 Engine 2 - Compressor Case 12:00 o'clock 432 Engine 3 - Compressor Case 12:00 o'clock 442 Engine 4 - Compressor Case 12:00 o'clock

 (2)  
Location Zone - Method 2
 452 Torque Box - No. 1 Strut
 462 Torque Box - No. 2 Strut
 472 Torque Box - No. 3 Strut
 482 Torque Box - No. 4 Strut

 (3)  
Access Panel - Method 1
 416 Right Thrust Reverser Half - Engine 1
 426 Right Thrust Reverser Half - Engine 2
 436 Right Thrust Reverser Half - Engine 3
 446 Right Thrust Reverser Half - Engine 4

 (4)  
Access Panel - Method 2 452LR Right Forward Core Cowl Skirt Fairing - Engine 1 462LR Right Forward Core Cowl Skirt Fairing - Engine 2 472LR Right Forward Core Cowl Skirt Fairing - Engine 3 482LR Right Forward Core Cowl Skirt Fairing - Engine 4

 E. Air Filter Installation

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 ALL  ú ú 01P Page 410 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 434-049
 CAUTION:_______DO NOT INSTALL THE SLEEVE (44) UPSIDE DOWN. FAILURE OF THE VALVE CAN RESULT.
 (1)  Install a new packing (45) and sleeve (44) in the modulating valve.
 NOTE: Single hole end of sleeve (44) should face out.
____
 S 424-050
 (2)
Install the air filter (43) and spring (42) in the modulating valve.

 S 434-051

 (3)  
Install a new packing (41) on the plug (40).

 S 644-052

 (4)
Lubricate the threads of the plug (40) with the anti-seize compound.

 S 434-053

 (5)  
Install the plug (40) in the fan air modulating valve.

 S 434-054

 (6)
Tighten the plug (40) to 20 to 30 inch-pounds (2.26 to 3.4 N m).

 S 434-055

 (7)  
Install the lockwire.

 F.
Put the Airplane Back To Its Usual Condition - Method 1

 S 414-056
 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU CLOSE THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Close the right thrust reverser (AMM 78-31-00/201).

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

 S 444-062

 (3)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).
　
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