(8)
Do the steps that follow if you must replace the high pressure controller (4) with a new high pressure controller:
(a)
Remove the fittings from the high pressure controller (4). 1) Remove the unions (9). 2) Discard the O-rings (10).
TASK 36-11-06-404-011
3. Install the High 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)
20-11-15/401, Bonding Jumpers and Ground Leads
(2)
20-22-01/601, Electrical Bonding
(3)
24-22-00/201, Manual Control
(4)
71-00-00/201, Power Plant
(5)
71-11-04/201, Fan Cowl Panels
(6)
71-11-06/201, Core Cowl Panels
(7)
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 High Pressure Controller
S 434-012
(1)
Do the steps that follow if you must install a new high pressure controller (4):
(a)
Install the fittings on the high pressure controller. 1) Apply the lubricant to the O-rings (10). 2) Apply anti-seize compound to the threads of the unions (9). 3) Install an O-ring on each union. 4) Install the unions in the high pressure controller.
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A
747-400 MAINTENANCE MANUAL
(2) S 424-013Use the three mounting bolts (6), and the washers (7) to install the high pressure controller (4) on the engine.
(3) S 434-014Use the bolt (8),the washer (12) and the nut (11) to connect the bonding jumper (3) to the ground strap (Ref 20-11-15/401).
(4) S 764-015Make sure the resistance between the bolt (8) and the ground strap of the high pressure controller is less than 0.005 ohms (Ref 20-22-01/601).
(5) S 644-039Apply anti-seize compound to the threads of the unions (9).
(6) S 434-016Remove the protective caps from the tubes.
(7) S 034-035Connect the high pressure tube (2) to the applicable union (9) on the high pressure controller (4).
(8) S 034-036Connect the signal pressure tube (2) to the applicable union (9) on the high pressure controller (4).
(9) S 864-017Put the applicable ENGINE BLEED switch to the ON position.
S 794-018
(10)
Apply the leak detector to the tube connections.
S 034-019
(11)
Make sure the electrical connector DM7191 (1) is not connected.
S 864-020
(12)
For the applicable engine: Remove the DO-NOT-CLOSE tag and close this circuit breaker:
(a)
P6 Main Power Distribution Panel 1) 6H32 AIR SUPPLY CONT 1 PWR 2) 6H33 AIR SUPPLY CONT 2 PWR 3) 6H34 AIR SUPPLY CONT 3 PWR 4) 6H35 AIR SUPPLY CONT 4 PWR
S 794-021
(13)
Dry motor the engine (Ref 71-00-00/201).
(a)
Examine the tube connections for leakage.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b) Repair the tube connections if there is leakage.
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