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).
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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).
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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
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////////////////////////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 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 大气 AIR 1(67)
