D.
Procedure
S 024-032-N00
(1) Remove the control cable:
(a)
Disconnect the coupling nut which attaches the forward end of the control cable to the actuator for the TCC air valve.
(b)
Remove the bolt and nut which attach the cable rod end to the idler arm on the shutoff valve for the HPT case cooling air.
(c)
Loosen the jamnuts of the control cable at the cable aft support bracket.
(d)
Remove the bolts and nuts which attach the control cable clamps to the two support brackets.
(e)
Disengage the inner piece on the forward end of the control cable from the actuator shaft groove.
(f)
Remove the control cable from the engine.
TASK 75-24-11-404-008-N00
3. Install the Turbine Case Cooling Air Valve Control Cable (Fig. 401)
________________________________________________________
A. Consumable Materials
(1) D00390 Oil - Engine
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(2)
G02334 Lockwire - AS3214-02
B.
References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
AMM 71-11-06/201, Core Cowl Panels
(3)
AMM 75-24-00/501, Turbine Cooling System
(4)
AMM 78-31-00/201, Thrust Reverser System
(5)
IPC 75-24-11 Fig. 1
C.
Access
(1)
Location Zone 412 Engine 1 - Fwd HPC Case to Aft LPT Case 3 o'clock 422 Engine 2 - Fwd HPC Case to Aft LPT Case 3 o'clock 432 Engine 3 - Fwd HPC Case to Aft LPT Case 3 o'clock 442 Engine 4 - Fwd HPC Case to Aft LPT Case 3 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 Install the Control Cable
S 424-033-N00
(1)
If it is necessary to install a new control cable, do the steps that follow:
(a)
Make sure the bushing on the aft end on the control cable is installed.
CAUTION: DO NOT TIGHTEN THE SEAL NUT TO MORE THAN 300 POUND-INCHES
_______
(33.9 NEWTON-METERS). IF YOU TIGHTEN THE SEAL NUT TOO MUCH, YOU CAN CAUSE DAMAGE TO THE CONTROL CABLE.
(b) Tighten the seal nut to 150-200 pound-inches (16.9-22.6 newton-meters) while you hold the control cable with a wrench.
NOTE: The bushing is correctly installed when the resistance
____ to the torque load increases quickly.
(c) Loosen the seal nut one-quarter to one-half of a turn.
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E. Procedure
S 424-034-N00
(1) Install the control cable:
(a)
Move the TCC air valve actuator forward on the slide rails until it touches the bracket stop.
(b)
Lubricate the threads of the coupling nut on the forward end of the control cable with engine oil.
(c)
Put the control cable in position on the engine.
(d)
Engage the inner piece of the forward end of the control cable with the shaft groove of the actuator.
(e)
Connect the coupling nut on the forward end of the control cable to the TCC air valve actuator. 1) Tighten the coupling nut with your hand until it is
correctly installed. 2) Loosen the coupling nut one-quarter of a turn.
(f)
Twist the aft end of the control cable and put the control cable into its position in the U-shaped slot in the cable aft support bracket.
NOTE: Make sure the jamnuts and washers are in the correct
____ position on each side of the U-shaped slot in the cable aft support bracket.
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