36-11-20
ALL ú ú 02P Page 404 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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.
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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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).
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