36-11-20
ALL ú ú 01P Page 406 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b)
Apply anti-seize compound to the threaded fittings (12, 16, 18).
(c)
Install the jamnut (13) and the O-ring (14) on the elbow (12).
(d)
Install the elbow (12) in the regulated pressure port. 1) Do not tighten the jamnut.
(e)
Install the O-ring (17) on the reducer (16).
(f)
Install the reducer (16) in the supply pressure port.
(g)
Install the swivel elbow (15) on the reducer.
1) Do not tighten.
(h)
Install the O-ring (14) on the union (18).
(i)
Install the union (18) in the actuator pressure port.
(j)
Install the swivel elbow (15) on the union.
1) Do not tighten.
S 424-015
(2)
Use the four mounting bolts (6) and the washers (7) to install the pressure controller (5) on the engine.
S 434-016
(3)
Use the ground strap with the bolt (8), the washer (11) and the nut (10) to connect the bonding jumper (4) (AMM 20-11-15/401).
S 764-017
(4)
Make sure the resistance between the bolt and the ground strap of the pressure controller is less than 0.005 ohms (AMM 20-22-01/601).
S 644-053
(5)
Apply anti-seize compound to the elbow threads (15).
S 824-018
(6)
Align the elbow (18) with the regulated pressure tube (1).
(a)
Tighten the jamnut (13).
S 824-040
(7)
Align the swivel elbows (15) with the actuator and supply pressure tubes (2 and 3).
(a)
Tighten the elbow.
S 434-019
(8)
Remove the caps from the tubes.
(a)
Connect the supply pressure tube (3), the actuator pressure tube (2) and the regulated pressure tube (1) to the controller (5).
(9)
Lock the HPSOV in the CLOSED position (AMM 36-11-05/201).
S 434-049
(10)
Connect the electrical connector, DV7200 (9) to the pressure controller (5).
S 044-020
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36-11-20
ALL ú ú 01P Page 407 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-022
(11)
Close the AIR SUPPLY CONT circuit breaker on the Main Power Distribution Panel, P6, for the applicable engine:
(a)
6H32 AIR SUPPLY CONT 1 PWR
(b)
6H33 AIR SUPPLY CONT 2 PWR
(c)
6H34 AIR SUPPLY CONT 3 PWR
(d)
6H35 AIR SUPPLY CONT 4 PWR
S 864-051
(12) Cycle the applicable bleed switch on the P5 panel, "OFF" and "ON", and leave it in the "ON" position.
NOTE: When the bleed switch is cycled, listen and feel for solenoid
____ operation in the pressure controller (where the electrical connector connects to the pressure controller).
S 034-050
(13) Disconnect the electrical connector, DV7200 (9) at the pressure controller (5).
NOTE: When the starter valve is open, an electrical signal is sent
____ to the pressure controller to close the PRV. You must remove the electrical connector to permit the PRV to open.
S 794-023
(14)
Apply the leak detector to the fittings of the pressure controller (5).
S 794-024
(15)
With the thrust reverser in the half open position, dry motor the engine (AMM 71-00-00/201).
S 984-025
WARNING: USE A LONG RATCHET WRENCH TO TURN THE PRV MANUAL OVERRIDE
_______ DRIVE. THE PRV CAN OPEN SUDDENLY WHEN YOU TURN THE MANUAL OVERRIDE DRIVE. THE MANUAL OVERRIDE DRIVE CAN PULL THE WRENCH OUT OF YOUR HANDS IF YOU DO NOT USE A RATCHET-DRIVE WRENCH. IF YOU USE A SHORT WRENCH, LEAKAGE FROM THE PRV COUPLINGS CAN CAUSE INJURIES TO PERSONS.
(16) While you motor the engine, turn the PRV manual override drive to the OPEN position (AMM 36-11-19/201). The PRV will stay in the OPEN position.
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