S 864-002-N00
 (1)  For the applicable engine, open these circuit breakers and install the DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) 6G1 FUEL SHUTOFF VALVE ENG 1
 2) 6G15 SCU ALT PWR ENG 1
 3) 6G23 ENG SCU 1

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITH PHASE 3 CHANGES OR ú

 75-24-13
 PRE-PW-SB 75-107  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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////

Turbine Vane and Blade Cooling Air Valve Position Switch Installation
Figure 401

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITH PHASE 3 CHANGES OR ú

 75-24-13
 PRE-PW-SB 75-107  ú ú N01 Page 402 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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 044-022-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.
 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 S 014-014-N00

 (3)  
Open the right fan cowl panel (AMM 71-11-04/201).

 S 014-015-N00

 (4)  
Open the right core cowl panel (AMM 71-11-06/201).

 S 014-023-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 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 right thrust reverser (AMM 78-31-00/201).

 D.
Remove the Position Switch for the TVBCA Valve

 S 034-004-N00
 (1)  
Disconnect the electrical connector from the position switch on the right TVBCA valve.

 S 024-005-N00

 (2)  
Remove the bolts which attach the position switch to the TVBCA valve.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITH PHASE 3 CHANGES OR ú

 75-24-13
 PRE-PW-SB 75-107  ú ú N03 Page 403 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 024-016-N00
 (3)  
Remove the position switch from the engine.

 S 034-006-N00

 (4)  
Install the protection caps on the openings of the TVBCA valve and the position switch.

 TASK 75-24-13-404-007-N00
 3.  Install the Turbine Vane and Blade Cooling Air Valve Position Switch____________________________________________________________________ (Fig. 401)
 A.  Standard Tools and Equipment
 (1)  
Wrench - Strap, Model TG-70, Glenair, Inc., 1211 Air Way, Glendale, CA 91201; or Model BT-BS-601, Daniels Mfg. Corp., 6103 Anno Ave., Orlando, FL 32809

 B.  
Consumable Materials

 (1)  
D00390 Oil - Engine

 (2)  
Lockwire - AS3214-01

 C.  
References

 (1)  
AMM 70-23-00/201, Tightening Techniques and Torque Values

 (2)  
AMM 71-00-00/501, Power Plant

 (3)  
AMM 71-11-04/201, Fan Cowl Panels

 (4)  
AMM 71-11-06/201, Core Cowl Panels

 (5)  
AMM 78-31-00/201, Thrust Reverser System

 (6)  
IPC 75-24-03 Fig. 1

 D.  
　
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 大氣 AIR 2(8)