75-33-03
ú ú N01 Page 407 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
HPC SECONDARY FLOW CONTROL VALVE AND IDG AIR/OIL HEAT EXCHANGER VALVE OVERRIDE
______________________________________________________________________________
SOLENOID - REMOVAL/INSTALLATION
_______________________________
1. General_______
A. This procedure is for engines without the Phase 3 changes. For engines
with the Phase 3 changes, do this procedure: Turbine Vane and Blade
Cooling Air Valve and IDG Air/Oil Heat Exchanger Valve Override Solenoid
Removal/Installation (AMM 75-24-15/401).
B. This procedure gives the instructions for the removal and the
installation of the override solenoid for the HPC secondary flow control
valve and the IDG air/oil heat exchanger valve. The override solenoid
for the HPC secondary flow control valve and the IDG air/oil heat
exchanger valve will be referred to as the override solenoid for this
procedure.
C. The override solenoid is installed on the aft face of the intermediate
case at the 1 o'clock position.
D. You can get access to the override solenoid through the right thrust
reverser.
TASK 75-33-04-004-001-N00
2. Remove the HPC Secondary Flow Control Valve and IDG Air/Oil Heat Exchanger__________________________________________________________________________ Valve Override Solenoid (Fig. 401)_______________________
A. References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
AMM 71-11-06/201, Core Cowl Panels
(3)
AMM 72-34-03/401, Fan Exit Liner Segment
(4)
AMM 78-31-00/201, Thrust Reverser System
B.
Access
(1)
Location Zone
412 Engine 1 - Intermediate Case Aft Face 1 o'clock
422 Engine 2 - Intermediate Case Aft Face 1 o'clock
432 Engine 3 - Intermediate Case Aft Face 1 o'clock
442 Engine 4 - Intermediate Case Aft Face 1 o'clock
(2)
Access Panel
416 Right Thrust Reverser Half - Engine 1
426 Right Thrust Reverser Half - Engine 2
436 Right Thrust Reverser Half - Engine 3
446 Right Thrust Reverser Half - Engine 4
C.
Prepare to Remove the Override 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/APU ENG START
or 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
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITHOUT PHASE 3 CHANGES ú
75-33-04
ú ú N03 Page 401 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
HPC SECONDARY FLOW CONTROL VALVE AND IDG AIR/OIL HEAT EXCHANGER VALVE OVERRIDE SOLENOID INTERMEDIATE
SEE B
CASE
FAN EXIT LINER SEGMENT
SEE A
BOLT PRESSURE(2 PLACES) SWITCH TUBE
IDG AIR/OIL FWD
HEAT EXCHANGER
CAP VALVE OVERRIDE
ADAPTER PRESSURE SWITCH
ADAPTER
GASKET GASKET A
IDG AIR/OIL HEAT EXCHANGER BOLT
EEC VALVE OVERRIDEELECTRICAL LOOP PRESSURE SWITCHCONNECTOR CLAMP BRACKET
SOLENOID HOUSINGS BOLT GASKET PLUG
HPC SECONDARY FLOW
GASKET CONTROL VALVE AND
ADAPTER IDG AIR/OIL HEAT EXCHANGER VALVE OVERRIDE SOLENOID
GASKET EEC ELECTRICAL CONNECTORADAPTERSUPPLY TUBE
AIR SIGNAL TUBE
B
HPC Secondary Flow Control Valve and IDG Air/Oil Heat Exchanger
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