B. Access
(1)
Location Zones
413 No. 1 Power plant
423 No. 2 Power plant
(2)
Access Panels
413AL Engine fan cowl
423AL Engine fan cowl
C. Prepare for Removal
S 864-001
(1) Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11C27 or 11C26, ENG ANTI-ICE LEFT
(b)
11C28 or 11C27, ENG ANTI-ICE RIGHT
S 044-002
WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURY OR DAMAGE.
(2) Do the procedure Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
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30-21-03
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757 MAINTENANCE MANUAL
D. Procedure
S 014-003
(1)
Open the engine fan cowl (413AL or 423AL) and obey the precautions for the Kevlar (AMM 71-11-04/201).
S 034-047
(2)
ENGINE TAI VALVE WITHOUT A TAI VALVE POSITION SWITCH;
Disconnect the electrical connector (AMM 70-50-02/201).
S 034-049
(3)
ENGINE TAI VALVE WITH A TAI VALVE POSITION SWITCH; Disconnect the two electrical connectors (AMM 70-50-02/201).
NOTE: A TAI valve without a position switch has only one
____ electrical connector. For valves in "LOCKED OUT" condition (AMM 30-21-00/501) to prevent possible damage to the position switch assembly. The manual lockout assembly should be restored to the normal condition, with position switch lever arm engaged in the valve slide notch and lock tongue exposed before valve is placed in unserviceable stock.
S 034-009
(4)
Hold the TAI valve (3) and release the coupling clamps (1)
(AMM 70-12-02/201).
S 034-011
(5)
Move the rear anti-icing duct aft and remove the TAI valve (3) from the engine.
S 034-013
(6)
Remove the gaskets (2) from both ends of the TAI valve (3)
(AMM 70-12-02/201).
NOTE: Examine the gasket for wear, cracks, dents, foreign objects
____ or other damage. Replace the gasket if you find damage. You can use the gasket again if you do not find damage.
S 494-015
(7) Install covers in all of the openings and connectors.
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