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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(n) ENGINES POST-PW-SB 73-164; For the right control valve (4), install the bracket (15) on the plain cover (9) with the bolts (1) and the washers (16). 1) Tighten the bolts (1) to 85-95 pound-inches (9.6-10.7
newton-meters). 2) Safety the bolts (1) which have lockwire holes with lockwire or safety cable and safety cable ferrule.
S 414-021-N00
(2)
For the left control valve (4), install the pneumatic manifold (AMM 36-11-01/401).
H.
Return the Aircraft to Its Usual Condition
S 414-041-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
Close the applicable thrust reverser (AMM 78-31-00/201).
S 414-042-N00
(2)
Close the core cowl panel (AMM 71-11-06/201).
S 414-043-N00
(3)
Close the fan cowl panel (AMM 71-11-04/201).
S 444-044-N00
(4)
Do the activation procedure for the thrust reversers
(AMM 78-31-00/201).
S 864-023-N00
(5)
For the applicable engine, remove the DO-NOT-CLOSE tags and close these circuit breakers that follow:
(a) P6 Main Power Distribution Panel
1) 6G1 FUEL SHUTOFF VALVE ENG 1
2) 6G15 SCU ALT PWR ENG 1
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
3) 6G23 ENG SCU 1
4) 6G2 FUEL SHUTOFF VALVE ENG 2
5) 6G16 SCU ALT PWR ENG 2
6) 6G24 ENG SCU 2
7) 6G3 FUEL SHUTOFF VALVE ENG 3
8) 6G17 SCU ALT PWR ENG 3
9) 6G25 ENG SCU 3
10) 6G4 FUEL SHUTOFF VALVE ENG 4
11) 6G18 SCU ALT PWR ENG 4
12) 6G26 ENG SCU 4
S 714-024-N00
(6) Do the test for the HPC Secondary Flow Control Valve that is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
PS3 AIR FILTER ASSEMBLY - REMOVAL/INSTALLATION
______________________________________________
1. General
_______
A. This procedure gives the instructions for the removal and the installation of the PS3 air filter assembly. For the removal and installation of the filter element for the PS3 air filter, refer to AMM 75-33-05/201.
B. Two (top and lower) filters are installed on each side of the HPC forward case at the 1:30 and 11 o'clock position.
C. ENGINES WITHOUT PHASE 3 CHANGES;
The filters clean the Ps3 air as follows:
(1)
The top right filter cleans the 15th-stage (muscle) air supply to the solenoids for the control valve for the HPC secondary flow and the IDG air/oil heat exchanger valve, the solenoid for the 2.9 bleed valve, and the stability pneumatic relay valve.
(2)
The lower right filter cleans the muscle air supply to the right control valve for the HPC secondary flow.
(3)
The top left filter cleans the muscle air supply to the solenoid for the control valves for the TVBCA on the HPC rear case.
(4)
The lower left filter cleans the muscle air supply to the left control valve for the HPC secondary flow.
D.
ENGINES WITH PHASE 3 CHANGES;
The filters clean the Ps3 air as follows:
(1)
The top right filter cleans the 15th-stage (muscle) air supply to solenoids for the Turbine Vane and Blade Cooling Air (TVBCA) valve and the IDG air/oil heat exchanger valve, the solenoid for the 2.9 bleed valve, and the stability pneumatic relay valve.
