(17)
Close the core cowl panels (AMM 71-11-06/201).
S 414-022-N00
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 444-029-N00
(18) Do the activation procedure for the thrust reversers (AMM 78-31-00/201).
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LOW PRESSURE TURBINE CASE COOLING MANIFOLDS - REMOVAL/INSTALLATION
__________________________________________________________________
1. General
_______
A. This procedure gives the instructions for the removal and installation of the top and lower manifolds (air tubes) for the Low Pressure Turbine (LPT) case cooling.
B. The LPT case cooling-air tubes are installed around the LPT case and are connected to the LPT case cooling collector.
C. You can get access to the LPT case cooling-air tubes through the left and right core cowl panels.
TASK 75-24-09-004-001-N00
2. Remove the Low Pressure Turbine Case Cooling Manifolds (Fig. 401)
______________________________________________________
A. References
(1)
AMM 71-11-06/201, Core Cowl Panels
(2)
AMM 75-24-04/401, LPT Case Cooling Air Shutoff Valve
(3)
AMM 78-31-00/201, Thrust Reverser System
(4)
IPC 36-11-01 Fig. 5
(5)
IPC 71-00-50 Fig. 1
(6)
IPC 72-50-54 Fig. 1
(7)
IPC 73-11-06 Fig. 40
(8)
IPC 73-21-07 Fig. 5
(9)
IPC 75-24-00 Fig. 10
(10)
IPC 75-24-07 Fig. 1
(11)
IPC 75-24-09 Fig. 5
(12)
IPC 79-21-51 Fig. 5
(13)
IPC 79-22-00 Fig. 15
(14)
IPC 79-23-00 Fig. 15
B.
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
C.
Prepare to Remove the LPT Case Cooling-Air Tubes
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
SEE R
LPT BRIDGE FLANGE P
BRACKET (6 LOCATIONS) NO. 7 COOLING FLANGE N AIR TUBE
1
SEE S
PRESSURE TUBE FLANGE M
FOR THE NO. 4 BEARING
SEE E SEE C
CLAMP TUBE NUT WITH SPRAY SHIELD
SEE F CLAMP
TUBE NUT
WITH SPRAY
TUBE NUT
SEE G
SHIELD
SCAVENGE TUBE
SEE Q FOR THE NO. 4 BEARING
TUBE CLAMP
TUBE CLAMP
SEE D
SEE H
TUBE CLAMP
TUBE NUT
SEE N
PT 4.95 PRESSURE TUBE
TUBE CLAMP
TUBE CLAMP
ONE EACH TUBE SEE P
SEE M
TUBE CLAMP
SEE LSEE I
SEE J
FWD SPRAY SHIELD TEE
OVER TUBE NUT TUBE CLAMP
AND ADAPTER
SEE O TUBE NUTBRACKET
SEE K OIL VENT TUBE
FOR THE NO. 3
BEARING
NO. 7 COOLING AIR TUBE
1 ENGINES WITH PHASE 3 CHANGES 1
2 ENGINES WITHOUT PHASE 3 CHANGES
A
L-A0569
ENGINES WITHOUT PW SB 79-76
0286
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