C.
Prepare to Remove the Solenoid
S 864-002-N00
(1) For the applicable engine, open this circuit breaker and install the DO-NOT-CLOSE tag:
(a) P6 Main Power Distribution Panel
1) 6F15 ENG 1 PERF SOL PWR A
2) 6F16 ENG 1 PERF SOL PWR B
3) 6E15 ENG 2 PERF SOL PWR A
4) 6E16 ENG 2 PERF SOL PWR B
5) 6D15 ENG 3 PERF SOL PWR A
6) 6D16 ENG 3 PERF SOL PWR B
7) 6C15 ENG 4 PERF SOL PWR A
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
INTERMEDIATE CASE
FAN EXIT LINER SEGMENT
ACCESSORY COOLING SEE A TUBE
SIGNAL TUBE SOLENOID FOR THE TURBINE VANE COOLING AIR VALVE 15TH-STAGE AND TURBINE VANE AND AIR SUPPLY TUBE
BLADE COOLING AIR VALVE
MOUNT LUG SEE B (2 LOCATIONS)
LUG (2 LOCATIONS)
A FWD
BOLT
CAP BOLT
CAP ADAPTER ACCESSORY COOLING TUBEADAPTER
GASKET
NUT
BOLT
GASKET BRACKET
BOLT
EEC ELECTRICAL GASKET CONNECTOR
ADAPTER
FWD
GASKET
TUBE NUT
BOLT
SOLENOID FOR THE TURBINE
GASKETVANE COOLING AIR VALVE AND TURBINE VANE AND BLADE
ADAPTER COOLING AIR VALVE
TUBE NUT ADAPTER
B
HPC Secondary Flow Control Valve and Turbine Vane and Blade Cooling Air Valve Solenoid Installation Figure 401
D15075
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
8) 6C16 ENG 4 PERF SOL PWR B
S 014-003-N00
(2) Open the left fan cowl panel (AMM 71-11-04/201).
S 044-006-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(3)
Do this procedure: Thrust Reverser Deactivation for Ground
maintenance (AMM 78-31-00/201).
S 014-004-N00
(4)
Open the left core cowl panel (AMM 71-11-06/201).
S 014-005-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(5)
Open the left thrust reverser (AMM 78-31-00/201).
S 014-007-N00
(6)
Remove the No. 7 segment of the fan exit liner (AMM 72-34-03/401).
D.
Procedure
S 024-037-N00
(1) Remove the solenoid:
(a)
Disconnect the EEC electrical connector from the solenoid.
1) Install protection caps on the EEC electrical connector and the receptacle on the solenoid.
(b)
Disconnect the two signal tubes and the 15th-stage air supply tube from the solenoid.
(c)
Remove the bolts which attach the solenoid and the bracket to the intermediate case.
NOTE: If necessary, loosen the bolt and nut which attach
____ the clamp of the accessory cooling tube to the bracket to get the clearance for the removal of the solenoid.
(d) Remove the solenoid from the engine.
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