(a)
Install the longer bolts at the support link locations.
(b)
Tighten the bolts (6 and 9) to 85-95 pound-inches (9.6-10.7 newton-meters).
(6)
Adjust the turbine cooling system (AMM 75-24-00/501).
S 834-012-N00
NOTE: You will install the adjuster assembly (4) during the
____
adjustment procedure.
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F. Put the Airplane Back to Its Usual Condition
S 414-017-N00
(1)
Close the right core cowl panel (AMM 71-11-06/201).
S 444-020-N00
(2)
Do the activation procedure for the thrust reversers
(AMM 78-31-00/201).
S 714-013-N00
(3)
Do the test of the LPT case cooling air shutoff valve that is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).
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TURBINE CASE COOLING AIR VALVE ACTUATOR - REMOVAL/INSTALLATION
______________________________________________________________
1. General
_______
A. This procedure gives the instructions for the removal and the installation of the Turbine Case Cooling (TCC) air valve actuator. The TCC air valve actuator will be referred to as the actuator for this procedure.
B. The actuator is found on the high pressure compressor (HPC) forward case at the 2 o'clock position.
C. You can get access to the actuator through the right thrust reverser half.
TASK 75-24-05-004-001-N00
2. Remove the Turbine Case Cooling Air Valve Actuator (Fig. 401)
__________________________________________________
A. Standard Tools and Equipment
(1)
Container - 1 U.S. gallon (4 liter) capacity for collecting fuel
B.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 71-11-04/201, Fan Cowl Panels
(3)
AMM 71-11-06/201, Core Cowl Panels
(4)
AMM 78-31-00/201, Thrust Reverser System
(5)
IPC 75-24-05 Fig. 1
C.
Access
(1)
Location Zone
412 Engine 1 - HPC Fwd Case 2 o'clock
422 Engine 2 - HPC Fwd Case 2 o'clock
432 Engine 3 - HPC Fwd Case 2 o'clock
442 Engine 4 - HPC Fwd Case 2 o'clock
(2)
Access Panel
416 Right Thrust Reverser Half - Engine 1
426 Right Thrust Reverser Half - Engine 2
436 Right Thrust Reverser Half - Engine 3
446 Right Thrust Reverser Half - Engine 4
D.
Prepare to Remove the Actuator
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-003-N00
(2)
Make sure the applicable FUEL CONTROL switch is in the CUTOFF position.
S 864-002-N00
(a) Attach the DO-NOT-OPERATE tag.
S 864-004-N00
(3) Push the STAT button on the select panel of the EICAS panel.
(a) Make sure the status page shows on the auxiliary EICAS.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
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