75-24-02
ALL ú ú N01 Page 402 ú Dec 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
NO. 1 TVC
AIR DUCT
BOLT GASKET
(6 LOCATIONS)
1
METERING ORIFICE
SEAL PLATE
2 4
B
BOLT
(4 LOCATIONS)
GASKET BOLT
(2 LOCATIONS)
TCC AIR VALVE
CONTROL CABLE
BRACKET SUPPORT TURNBUCKLE
ROD END
NO. 1 TVC
AIR DUCT
CLAMP
BOLT (2 LOCATIONS)
NO. 1 TVC TURBINE VANE
AIR DUCT COOLING AIR
VALVE
C
GASKET
TURBINE VANE COOLING AIR DUCT
BOLT (6 LOCATIONS) GASKET
D4
(2 LOCATIONS) NUT FLANGE M BRACKET ON D 3 1 PLATE SEAL ORIFICE METERING (6 LOCATIONS) BOLT AIR DUCT NO. 2 TVC BRACKET
CLAMP E
NO. 2 TVC AIR DUCT 2 GASKET NO. 2 TVC AIR DUCT BOLT, NUT SUPPORT TUBE
BOLT (2 LOCATIONS) 5 3
F WIRING
1 ENGINES WITHOUT PW SB 72-315 HARNESS
2 ENGINES WITH PW SB 72-315
5 3 4 ENGINES WITH PW SB 75-57 ENGINES WITH PHASE 3 ENGINES WITHOUT PHASE 3 G BRACKET L-A3964 (6 LOCATIONS) BOLT L-A3965
Turbine Vane Cooling Air Duct Installation - Right Side Figure 401 (Sheet 2)
E25424
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75-24-02
ALL ú ú N04 Page 403 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 044-105-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).
S 014-104-N00
(2)
Open the right fan cowl panel (AMM 71-11-04/201).
S 014-106-N00
(3)
Open the right core cowl panel (AMM 71-11-06/201).
S 014-107-N00
WARNING: OBEY THE INSTRUCTIONS IN 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.
(4)
Open the right thrust reverser (AMM 78-31-00/201).
D.
Procedure
S 024-165-N00
(1)
Remove the No.1 turbine-vane cooling air-duct:
(a)
ENGINES WITHOUT PHASE 3 CHANGES; Remove the bolts which attach the forward flange of the TVC air duct and bracket to the boss on the HPC case.
(b)
ENGINES WITH PHASE 3 CHANGES; Remove the bolts that attach the front flange of the cooling air duct to the flange of the turbine vane cooling air valve on the HPC case.
(c)
Remove the bolts which attach the aft flange of the TVC air duct to the boss on the HPC case.
(d)
Remove the bolts which attach the clamp for the TVC air duct to the support on the diffuser case.
(e)
Remove the TVC air duct from the engine.
1) ENGINES WITHOUT PHASE 3 CHANGES; Remove and discard the gasket on the boss of the HPC case.
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