FWD
DRAIN
SERVO FUEL TUBE
SUPPLY TUBE
SERVO FUEL
RETURN TUBE
B
Turbine Case Cooling Air Valve Actuator Installation
Figure 401 (Sheet 1)
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(b) Make sure the applicable FUEL SPAR VLV 1, 2, 3, or 4 status message does not show.
___
S 864-005-N00
(4) For the applicable engine, open these circuit breakers on the main power distribution panel, P6, and install the DO-NOT-CLOSE tags:
(a)
6G1 FUEL SHUTOFF VALVE ENG 1
(b)
6G15 SCU ALT PWR ENG 1
(c)
6G23 ENG SCU 1
FWD
Turbine Case Cooling Air Valve Actuator Installation
Figure 401 (Sheet 2)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(d)
6G2 FUEL SHUTOFF VALVE ENG 2
(e)
6G16 SCU ALT PWR ENG 2
(f)
6G24 ENG SCU 2
(g)
6G3 FUEL SHUTOFF VALVE ENG 3
(h)
6G17 SCU ALT PWR ENG 3
(i)
6G25 ENG SCU 3
(j)
6G4 FUEL SHUTOFF VALVE ENG 4
(k)
6G18 SCU ALT PWR ENG 4
(l)
6G26 ENG SCU 4
S 014-050-N00
(5) Open the right fan cowl panel (AMM 71-11-04/201).
S 044-049-N00
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(6)
Do this procedure: Thrust Reverser Deactivation for Ground
Maintenance (AMM 78-31-00/201).
S 014-048-N00
(7)
Open the right core cowl panel (AMM 71-11-06/201).
S 014-047-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(8)
Open the right thrust reverser (AMM 78-31-00/201).
E.
Procedure
S 024-056-N00
(1)
Remove the actuator:
(a)
Disconnect the EEC electrical connector from the actuator.
1) Install protection caps to the EEC electrical connector and the receptacle on the actuator.
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(b)
Remove the bolt and nut which attach the rod end bearing of the control cable to the idler arm on the HPT cooling-air shutoff valve.
(c)
Disconnect the coupling nut of the control cable from the actuator shaft.
(d)
Put the container below the fuel lines to catch the remaining fuel.
(e)
Disconnect the servo fuel supply, servo fuel return and drain tubes from the actuator.
(f)
Remove the bolt which attaches the ground strap to the actuator.
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