NOTE: Do not install the bolt and the nut at the support link
____ of the lower flange location. They will be installed at another time.
 1)  Tighten the bolts to 85-95 pound-inches (9.6-10.7 newton-meters).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-24-03
 ALL  ú ú N02 Page 408 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 414-013-N00
 (4)  Do this task for the applicable engine: "Install the LPT Case Cooling Air Shutoff Valve" (AMM 75-24-04/401).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-24-03
 ALL  ú ú N01 Page 409 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
LOW PRESSURE TURBINE CASE COOLING AIR SHUTOFF VALVE - REMOVAL/INSTALLATION
__________________________________________________________________________
 1.  General
_______
 A.  This procedure removes and installs the low pressure turbine (LPT) case cooling air shutoff valve.
 B.  The shutoff valve is found on the LPT case at the 2 o'clock position between the cooling air inlet duct and the LPT case cooling collector.
 C.  You can get access to the shutoff valve through the right core cowl panel.
 TASK 75-24-04-004-001-N00
 2.  Remove the Low Pressure Turbine Case Cooling Air Shutoff Valve (Fig. 401)
______________________________________________________________
 A.  References
 (1)  
AMM 71-11-06/201, Core Cowl Panels

 (2)  
AMM 78-31-00/201, Thrust Reverser System

 (3)  
IPC 75-24-00 Fig. 15

 (4)  
IPC 75-24-04 Fig. 1

 B.  
Access

 (1)  
Location Zone
 412 Engine 1 . LPT Case 2 o'clock
 422 Engine 2 . LPT Case 2 o'clock
 432 Engine 3 . LPT Case 2 o'clock
 442 Engine 4 . LPT Case 2 o'clock

 (2)  
Access Panel
 418 Right Core Cowl Panel - Engine 1
 428 Right Core Cowl Panel - Engine 2
 438 Right Core Cowl Panel - Engine 3
 448 Right Core Cowl Panel - Engine 4

 C.  
Procedure

 S 044-019-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.
 (1)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 (2)  
Open the right core cowl panel (AMM 71-11-06/201).

 S 034-003-N00

 (3)  
Remove the bolts (9) and nuts (5) which attach the lower support link to flanges of HPT and LPT manifold collectors.

 S 014-002-N00
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-24-04
 ALL  ú ú N01 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 ////////////////////////
7. LPT TCC AIR SHUTOFF VALVE 
BRACKET SUPPORT UPPER 
SEE  A  1. BOLT 2. NUT 
4. ADJUSTER (4 LOCATIONS) 8. BOLT COLLECTOR 6. BOLT 5. NUT (4 LOCATIONS) (4 LOCATIONS) TCC (LPT) 
7. LPT TCC AIR SHUTOFF VALVE  B  B 
A  A 

6. BOLT 
(4 LOCATIONS) 
5. NUT 
(4 LOCATIONS) 
ENGINES WITHOUT PHASE 3 
A 

8. BOLT (4 LOCATIONS) L-A9896 (0000)
4. ADJUSTER
HPT TCC AIR SHUTOFF VALVE
B B
A A
CONTROL
CABLE
LOWER SUPPORT BRACKET
TCC (HPT)
COLLECTOR

ENGINES WITH PHASE 3
A

1.
 BOLT

2.
 NUT

HPT TCC AIR
SHUTOFF VALVE

LPT TCC Air Shutoff Valve Installation
　
中國航空網 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 1(67)