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75-24-05
ALL ú ú N03 Page 409 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
HIGH PRESSURE TURBINE CASE COOLING COLLECTOR - REMOVAL/INSTALLATION
___________________________________________________________________
1. General
_______
A. This procedure gives the instructions for the removal and installation of the high pressure turbine (HPT) case cooling collector.
B. The HPT case cooling collector is found on the HPT case at approximately the 3 o'clock position. The HPT collector is connected to the HPT case cooling air shutoff valve.
C. You must loosen the clamps which attach the air tubes for the HPT case cooling manifold before you remove the HPT collector.
D. You can get access to the HPT collector through the thrust reverser halves.
TASK 75-24-06-004-001-N00
2. Remove the High Pressure Turbine Case Cooling Collector (Fig. 401)
_______________________________________________________
A. References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
AMM 71-11-06/201, Core Cowl Panels
(3)
AMM 75-24-02/401, Turbine Vane Cooling Air Duct
(4)
AMM 78-31-00/201, Thrust Reverser System
(5)
IPC 73-21-07 Fig. 5
(6)
IPC 75-24-00 Fig. 5
(7)
IPC 75-24-09 Fig. 1
B.
Access
(1)
Location Zone
412 Engine 1 - HPT Case 3 o'clock
422 Engine 2 - HPT Case 3 o'clock
432 Engine 3 - HPT Case 3 o'clock
442 Engine 4 - HPT Case 3 o'clock
(2)
Access Panel 415 and 416 Thrust Reverser Halves - Engine 1 425 and 426 Thrust Reverser Halves - Engine 2 435 and 436 Thrust Reverser Halves - Engine 3 445 and 446 Thrust Reverser Halves - Engine 4
C.
Prepare to Remove the HPT Case Cooling Collector
(1)
Open the right fan cowl panel (AMM 71-11-04/201).
S 014-025-N00
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-24-06
ALL ú ú N01 Page 401 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
COOLING AIR
INLET DUCT HPT CASE COOLING AIR VALVE
SEE B
SEE A B B HPT CASE COLLECTOR COOLING
HARNESS WIRING
NUT FLANGE M SUPPORT TUBE
CLAMP A A BOLT AND NUT CLAMP,BOLT, AND NUT
(8 PLACES) BOLT
AFT HPT CASE COOLING AIR TUBE BRACKET BOLT FWD CLAMP (4 PLACES) NUT (4 PLACES) BOLT AND AIR TUBE BRIDGE BRACKET HPT COOLING BOLT AND NUT (2 PLACES) COLLECTOR BRACKET B A NUT BOLT AND (2 PLACES) DUCT TURBINE VANE (NO. 2) LOWER RIGHT COOLING AIR LOWER SUPPORT BRACKET BOLT AND NUT (6 PLACES)
AFT HPT CASE CENTER HPT CASE FORWARD HPT
COOLING COOLING AIR TUBES CASE COOLING LOWER
AIR TUBE FLANGE N FLANGE M AIR TUBE SUPPORT LINK
(6 PLACES) HPT CASE
A-A COOLING AIR
SHUTOFF VALVE
LOWER FLANGE
L-A0722
0286 B-B
High Pressure Turbine Case Cooling Collector Installation
Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-24-06
ALL ú ú N01 Page 402 ú Dec 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 044-026-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
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