36-11-20
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (7)  
Open the left thrust reverser (AMM 78-31-00/201).

 D.
Remove the Pressure Controller

 S 864-037
 (1)  
Do the steps that follow to remove the pressure from the supply pressure tube (3):

 (a)  
Turn the manual override drive, on the HPSOV, to the OPEN position (AMM 36-11-05/201).

 (b)  
Hold the valve in the OPEN position momentarily.

 (c)  
Put the valve to the CLOSED position.

 S 034-007
 (2)  
Disconnect the electrical connector DV7200 (9) from the pressure controller (5).

 S 034-008

 (3)  
Disconnect the regulated pressure tube (1), the actuator pressure tube (2), and the supply pressure tube (3) from the pressure controller (5).

 S 034-009

 (4)
Put caps on the open tubes and ports to keep out unwanted objects.

 S 034-010

 (5)  
Remove the nut (10), the washer (11) and the bolt (8) to disconnect the bonding jumper (4).

 S 034-038

 (6)  
Remove the four mounting bolts (6) and the washers (7) from the pressure controller (5).

 S 024-039

 (7)  
Remove the pressure controller from the engine.

 S 034-012

 (8)  
If it is necessary to install a new pressure controller (5), do the steps that follow to remove the fittings from the pressure controller:

 (a)  
Remove the elbow (12), the jamnut (13) and the O-ring (14) from the regulated pressure port.

 (b)  
Discard the O-ring.

 (c)  
Remove the swivel elbow (15), the reducer (16) and the O-ring (17) from the supply pressure port.

 (d)  
Discard the O-ring.

 (e)  
Remove the swivel elbow (15), the union (18) and the O-ring (14) from the actuator pressure port.

 (f)  
Discard the O-ring.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 36-11-20
 ALL  ú ú 02P Page 405 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 36-11-20-404-013
 3.  Install the Pressure Controller (Fig. 401)_______________________________
 A. Consumable Materials
 (1)  
D01062, Never-Seez, Pure Nickel Special, NSBT-8N
 (High temperature anti-seize compound)

 (2)  
G00095, Detector - Leak, Leak-Tek (160X)

 (3)  
D00062, Lubricant - Pneumatic System Thread, FS 1292 (Fluor-Silicone) MIL-G-4343

 B. References
 (1)  
AMM 20-11-15/401, Bonding Jumpers and Ground Leads

 (2)  
AMM 20-22-01/601, Electrical Bonding

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 36-11-05/201, High Pressure Shutoff Valve

 (5)  
AMM 36-11-19/201, Pressure Regulating Valve

 (6)  
AMM 71-00-00/201, Power Plant

 (7)  
AMM 71-11-04/201. Fan Cowl Panels

 (8)  
AMM 71-11-06/201, Core Cowl Panels

 (9)  
AMM 78-31-00/201, Thrust Reverser System

 C. Access
 (1)  
Location Zone 412 Engine 1 - Main Gearbox Forward Face 7 o'clock 422 Engine 2 - Main Gearbox Forward Face 7 o'clock 432 Engine 3 - Main Gearbox Forward Face 7 o'clock 442 Engine 4 - Main Gearbox Forward Face 7 o'clock

 (2)  
Access Panel
 415 Left Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4

 D. Install the Pressure Controller
 S 434-014
 (1)  
If you must install a new pressure controller (5), do the steps that follow to install the fittings in the new controller:

 (a)  
Apply lubricant to the O-rings (14 and 17).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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