(b)  
Remove the lower support bracket.

 S 024-065-N00
 (13) Remove the LPT case cooling-air tubes:
 (a)  Remove the bolts and nuts which attach the clamps of the cooling air tube and the angle bracket for the lower forward cooling air tube at the 5 o'clock position.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)  Remove the bolts and nuts which attach the applicable bridge brackets to the Flange N brackets.
 NOTE: The bolt and nut at the approximately 8 o'clock position
____ also attach the clamp which holds the cooling air tubes for the HPT case.
 (c)  
Remove the bolts, nuts and clamps which attach the aft mounts of the applicable bridge brackets to the Flange P brackets.

 (d)  
Remove the bolts which attach the cooling air tubes to the collector.

 (e)  
Disengage the cooling air tubes from the collector.

 (f)  
Move the bridge brackets (with the cooling air tubes connected which are not to be removed) away from the LPT case.

 (g)  
Remove the cooling air tube from the engine.

 (h)  
Remove the cover assemblies on the two sides of the engine at the rear of the collector.

 S 024-066-N00
 (14) Install protection caps to the openings in the cooling-air tubes and the LPT case cooling collector.
 TASK 75-24-09-404-019-N00
 3. Install the Low Pressure Turbine Case Cooling Manifolds (Fig. 401)
_______________________________________________________
 A. Equipment
 (1)  M303, M305, or M307 Bergen Mechanical Crimper
 Bergen Cable Technologies Inc
 170 Gregg St

 P.O.
 Box 1300
 Lodi, NJ 07644-9982

 B.
Consumable Materials

 (1)  
D00390 Oil - Engine

 (2)  
G00964 Compound - Antigalling, Fel-Pro C-200

 (3)  
A00637 Compound - Antigalling, Hi-T 650, PWA 550-3

 (4)  
G02334 Lockwire - AS3214-02

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 75-24-09
 ALL  ú ú N02 Page 426 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(5)  
G02332 Ferrule - P05-292 (Optional)

 (6)  
G02335 Cable - Safety - P05-291 (Optional)

 C.
References

 (1)  
AMM 71-00-00/501, Power Plant

 (2)  
AMM 71-11-06/201, Core Cowl Panels

 (3)  
AMM 75-24-04/401, LPT Case Cooling Air Shutoff Valve

 (4)  
AMM 77-11-00/501, Engine Pressure Ratio Indicating System

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

 (6)  
IPC 36-11-01 Fig. 5

 (7)  
IPC 71-00-50 Fig. 1

 (8)  
IPC 72-50-54 Fig. 1

 (9)  
IPC 73-11-06 Fig. 40

 (10)
 IPC 73-21-07 Fig. 5

 (11)
 IPC 75-24-00 Fig. 10

 (12)
 IPC 75-24-07 Fig. 1

 (13)
 IPC 75-24-09 Fig. 5

 (14)
 IPC 79-21-51 Fig. 5

 D.
Access

 (1)  
Location Zone
 412 Engine 1 - LPT Case
 422 Engine 2 - LPT Case
 432 Engine 3 - LPT Case
 442 Engine 4 - LPT Case

 (2)  
Access Panel
 417 and 418 Core Cowl Panels - Engine 1
 427 and 428 Core Cowl Panels - Engine 2
 437 and 438 Core Cowl Panels - Engine 3
 447 and 448 Core Cowl Panels - Engine 4

 E.
Procedure

 S 424-067-N00
 (1)  
Remove the protection caps from the cooling-air tubes and the LPT case cooling collector.

 S 424-068-N00

 (2)  
Install the LPT case cooling-air tubes:

 (a)  
Move the bridge brackets (with the cooling air tubes connected which were not removed) away from the LPT case.
　
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