8
METERING ORIFICE SEAL PLATE
PNUEMATIC LINE NO. 3 SUPPORT BRACKET BEARING
OIL TUBE ENGINE FIRE DETECTOR ELEMENT
1 2
SUPPORT BRACKET
BRACKET
BOLT GASKET
(4 LOCATIONS)
NO. 3 TVC
AIR DUCT
WASHER
(4 LOCATIONS)
BRACKET
7
4
NO. 4 BEARING
NUT OIL TUBE
(4 LOCATIONS)
BOLT
WASHER (6 LOCATIONS) BOLT BOLT BRACKET
(2 LOCATIONS) BOLT (6 LOCATIONS)
(2 LOCATIONS)
F
5
NO. 4 BEARING OIL
4
ENGINES WITHOUT PW SB 79-54 TUBE
5
ENGINES WITH PW SB 79-54 BOLT
6
ENGINES WITH PW SB 79-52
7
ENGINES WITHOUT PW SB 72-603
L-A3964 8 ENGINES WITH PW SB 72-603 L-A2965
Turbine Vane Cooling Air Duct Installation - Left Side Figure 402 (Sheet 3)
G83818
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75-24-02
ALL ú ú N06 Page 410 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
NO. 4 TVC
AIR DUCT
ENGINE OIL TANK
SCUPPER DRAIN
TUBE
CLAMP,
BOLT,
NUT,
CLAMP, WASHER
BOLT,
NUT
DEOILER
OUTLET TUBE
CLAMP,
BOLT, 2
NUT
METERING ORIFICE
SEAL PLATE
NO. 3 TVC
AIR DUCT 1
SEE H GASKET
3
FWD BOLT,
CLAMP, NUT, BOLT, NO. 3 TVC
WASHER WASHER, AIR DUCTNUT
G
METERING
GASKET ORIFICE SEAL PLATE
BOLT (6 LOCATIONS)
2
GASKET
BORESCOPE
1
FWD PLUG
NO. 3 TVC AIR DUCT
BOLT BOLT (6 LOCATIONS) (3 LOCATIONS)
ENGINES WITHOUT BORESCOPE PLUG ENGINES WITH BORESCOPE PLUG H
L-A3964,L-A4239,0688
Turbine Vane Cooling Air Duct Installation - Left Side Figure 402 (Sheet 4)
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ALL ú ú N07 Page 411 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
C. Prepare to Remove the No.3 Turbine-Vane Cooling Air-Duct
S 044-113-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 014-112-N00
(2)
Open the left fan cowl panel (AMM 71-11-04/201).
S 014-114-N00
(3)
Open the left core cowl panel (AMM 71-11-06/201).
S 014-115-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 left thrust reverser (AMM 78-31-00/201).
D.
Procedure
S 024-167-N00
(1)
Remove the No.3 turbine-vane cooling air-duct:
(a)
Remove the drain tube for the oil tank scupper with the steps that follow: 1) Disconnect the tube nut from the elbow adapter on the oil
tank scupper.
2) Remove the bolt, nut, and washer which attach the tube clamp for the drain tube to the support bracket on the flange N rearward of the deoiler outlet tube.
3) Remove the bolt, nut, and washer which attach the tube clamp for the drain tube to the bracket on the flange N at the 6:30 o'clock position.
4) Remove the bolt, nut, and washer which attach the aft end clamp of the drain tube to the bracket on the flange M. 5) Remove the drain tube.
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