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757
MAINTENANCE MANUAL

 (8)  S 865-160Open these circuit breakers on the overhead circuit breaker panel, P11, and attach a DO-NOT-CLOSE tag: (a) 11C19, LANDING GEAR POS SYS 2 ALTN (b) 11S23, LANDING GEAR POS SYS 2
 (9)  S 865-142Put the WING ANTI-ICE switch-light on the P5 panel in the ON position. Make sure the white light comes on.
 S 215-053

 (10) Make sure the L VALVE light on the P5 panel comes on, and L WING ANTI-ICE shows on the EICAS display.
 NOTE: The R VALVE light will go ON then go OFF.
____
 S 215-141
 (11) Make sure the position indicator on the right TAI valve shows the full open position.
 S 755-068
 WARNING: DO NOT TRY TO TIGHTEN THE CLAMPS OR FLANGES WHEN THE DUCTS ARE
_______ PRESSURIZED. THE HOT PRESSURIZED AIR CAN CAUSE INJURY TO PERSONS.
 (12) Make sure that there is not too much leakage at any duct position downstream of the right TAI valve.
 NOTE: Some leakage is permitted, but no fast air movement should be
____ felt 12 inches from a leak.
 S 215-056
 (13) Make sure the pressure gage shows 13-20 psig.
 NOTE: If the duct pressure is not 13-20 psig and no bad leaks are
____ found, replace the wing TAI valve.
 S 865-057
 (14)
 Put the WING ANTI-ICE switch-light on the P5 panel in the OFF position. Make sure the ON light goes off.

 (15)
 Make sure the L VALVE light on the P5 panel goes off.

 (16)
 Make sure L WING ANTI-ICE does not show on the EICAS display.

 S 215-058
 S 215-137
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757 MAINTENANCE MANUAL
 S 865-161
 (17) Remove the DO-NOT-CLOSE tag and close these P11 panel circuit breakers:
 (a)  
11C19, LANDING GEAR POS SYS 2 ALTN

 (b)  
11S23, LANDING GEAR POS SYS 2

 S 085-061
 (18)
 Remove the pressure gage from the tee duct.

 S 415-062

 (19)
 Put the cap on the fitting.
　
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