S 015-149

 (2)  
Remove the fixed upper wing panel 522BL (AMM 06-44-00/201).

 S 015-039

 (3)  
Remove the fixed lower wing panel 521AB (AMM 06-44-00/201).

 (4)  
Supply electrical power (AMM 24-22-00/201).

 S 865-041

 (5)  
Make sure the ISOLATION VALVE switch-light on the P5 panel is in the OFF position.

 S 865-042

 (6)  
Make sure the WING ANTI-ICE switch-light on the P5 panel is in the OFF position.

 S 865-040
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 30-11-00
 ALL  ú ú 02 Page 512 ú Sep 20/94

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757 MAINTENANCE MANUAL
 S 865-043
 WARNING:_______YOU MUST USE EYE AND EAR PROTECTIVE DEVICES. THE HOT AIR IN THE PRESSURIZED DUCTS CAN CAUSE INJURY TO PERSONS.
 (7)  To supply pneumatic power, hold the left pneumatic service connector open, and connect the air supply to the left pneumatic service connector (AMM 36-00-00/201).
 F. Procedure (Fig. 501, 502)
 S 485-045
 (1)  Attach a pressure gage to the fitting on the outboard end of the left TAI tee duct.
 S 865-000
 CAUTION: DO NOT OPERATE THE WING ANTI-ICE WINDOW/PROBE HEAT TEST SWITCH
_______ IN THE WING ANTI-ICE POSITION FOR MORE THAN 7 CYCLES AT AN AMBIENT TEMPERATURE OF 50°F, OR FOR MORE THAN 4 CYCLES AT AN AMBIENT TEMPERATURE OF 100°F. INTERPOLATE OR EXTRAPOLATE FOR AMBIENT TEMPERATURES INSIDE OR OUTSIDE OF THIS RANGE TO OBTAIN THE MAXIMUM NUMBER OF CYCLES. DAMAGE TO THE LEADING EDGE PANELS CAN OCCUR IF THE WING ANTI-ICE TEST SWITCH IS OPERATED FOR MORE THAN THE SPECIFIED NUMBER OF CYCLES.
 (2)  
Hold the WING ANTI-ICE WINDOW/PROBE HEAT test switch on the right sidewall panel, P61, in the WING ANTI-ICE position. Start the operation of the timing device at the same time.

 S 215-150

 (3)  
Make sure the L VALVE light comes on and L WING ANTI-ICE shows on the EICAS display.

 NOTE: The EICAS message will be shown in 2 to 3 seconds.
____
 S 215-151
 (4)  
Make sure the pressure gage shows 13-30 psig.

 S 215-049

 (5)  
Make sure the L VALVE light on the P5 panel goes off, and the EICAS message L WING ANTI-ICE does not show after approximately 12 seconds.

 (6)  
Release the WING ANTI-ICE WINDOW/PROBE HEAT test switch.

 S 865-050
　
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