________________________________________
1. General_______
A. This procedure is for engines with the Phase 3 changes. For engines
without the Phase 3 changes, do this procedure: HPC Secondary Flow
Control Valve and IDG Air/Oil Heat Exchanger Valve Override Solenoid
Removal/Installation (AMM 75-33-04/401).
B. This procedure gives the instructions for the removal and installation of the solenoid for the Turbine Vane and Blade Cooling Air (TVBCA) Valve and the IDG air/oil heat exchanger valve override. The solenoid for the Turbine Vane and Blade Cooling Air (TVBCA) Valve and the IDG air/oil heat exchanger valve override will be referred to as the solenoid for this procedure.
C. The solenoid is installed on the aft face of the intermediate case at the 1 o'clock position.
D. You can get access to the solenoid through the right thrust reverser.
TASK 75-24-15-004-042-N00
2. Remove the Turbine Vane and Blade Cooling Air 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 Solenoid
S 864-043-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
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITH PHASE 3 CHANGES ú
75-24-15
ú ú N01 Page 401 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SOLENOID FOR THE TURBINE VANE AND BLADE COOLING AIR VALVE AND IDG AIR/OIL HEAT EXCHANGER VALVE
SEE B
INTERMEDIATE CASE
SEE A FAN EXIT LINER SEGMENT
BOLT
(2 LOCATIONS) PRESSURE SWITCH TUBE
CAP
ADAPTER
IDG AIR/OIL FWD ADAPTER HEAT EXCHANGER
GASKET VALVE OVERRIDEGASKET PRESSURE SWITCH
OVERRIDE PRESSURE A
BOLT SWITCH FOR THE
EEC IDG AIR/OIL HEATELECTRICAL
LOOP EXCHANGER VALVE
CONNECTOR CLAMP BRACKET
SOLENOID
BOLT
HOUSINGS
GASKET
PLUG SOLENOID FOR THE TURBINEGASKET
VANE AND BLADE COOLINGSUPPLY AIR VALVE AND IDG AIR/OIL TUBE HEAT EXCHANGER VALVE
GASKET EEC ELECTRICAL
ADAPTER CONNECTOR
ADAPTER
AIR SIGNAL TUBE B
Solenoid for the Turbine Vane and Blade Cooling Air Valve and
IDG Air/Oil Heat Exchanger Valve - Installation
Figure 401
D20479
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITH PHASE 3 CHANGES ú
75-24-15
ú ú N01 Page 402 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
7) 6C15, ENG 4 PERF SOL PWR A
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