(c)  
See that the L VALVE OPEN and R VALVE OPEN lights come on brightly for 1 to 3 seconds.

 (d)  
See that the L VALVE OPEN and R VALVE OPEN lights are off after 3 seconds.

 (e)  
Push the left thrust lever fully forward.

 (f)  
Put the WING ANTI-ICE switch in the ON position.

 (g)  
See that the L VALVE OPEN and the R VALVE OPEN lights come on brightly for 1 to 3 seconds.

 (h)  
See that the L VALVE OPEN and the R VALVE OPEN are on dimly after 3 seconds.

 (i)  
Pull the left thrust lever to the IDLE position.

 (j)  
Put the WING ANTI-ICE switch in the OFF position.

 (k)  
See that the L VALVE OPEN and the R VALVE OPEN lights go off.

 (l)  
Push the right thrust lever fully forward.

 (m)  
Put the WING ANTI-ICE switch in the ON position.

 (n)  
See that the L VALVE OPEN and the R VALVE OPEN lights come on brightly for 1 to 3 seconds.

 (o)  
See that the L VALVE OPEN and the R VALVE OPEN lights are on dimly after 3 seconds.

 (p)  
Pull the right thrust lever to the IDLE position.

 (q)  
Put the WING ANTI-ICE switch in the OFF position.

 (r) See that the L VALVE OPEN and the R VALVE OPEN lights go off. ú (s) Close the Landing Gear - AIR/GND Relay and Lights and the ú LANDING GEAR - NOSE GEAR AIR/GND circuit breakers.
 S 865-035
 (6)  Install the access panels (AMM 12-30-00/201).
 TASK 30-11-00-725-010
 4. Wing TAI Duct Leakage Test
__________________________
 A. General
 (1)  You can use engine bleed air, APU bleed air or an external air source to do this test. The TAI valves close if the air is more than approximately 125 degrees C.
 B. References
 (1)  
AMM 12-30-00/201 Wing Lower Surface Access Panels

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 27-81-00/001, Leading Edge Flap and Slat Control System -Description and Operation

 (4)  
AMM 27-81-00/201, Leading Edge Flap and Slat Control System -Maintenance Practices

 (5)  
AMM 49-11-00/201 APU Power Plant - Maintenance Practices

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 30-11-00
 ALL  ú ú 01.1 Page 509 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 C.

D.
E.
A
737-300/400/500MAINTENANCE MANUAL
 (6)  
AMM 71-00-00/201, Power Plant - Maintenance Practices (Operating

 Procedures)Access

 (1)  
Location Zone 101 Control Cabin - Left 302 Left Wing Outboard Leading Edge 402 Right Wing Outboard Leading Edge

 (2)  
Access Panels 6307L Slat Access Panel Removable 6212L Slat Access Panel 6241L Slat Access Panel Removable 6216L Slat Access Panel 6218L Slat Access Panel 6223L Slat Access Panel 6226L Slat Access Panel 6231L Slat Access Panel 6407R Slat Access Panel Removable 6512R Slat Access Panel 6541R Slat Access Panel Removable 6534R Slat Access Panel 6516R Slat Access Panel Removable 6537R Slat Access Panel 6523R Slat Access Panel 6526R Slat Access Panel 6531R Slat Access Panel

Prepare to do the test.
 S 865-011
 (1)  
Extend the leading edge slats (AMM 27-81-00/001).

 S 495-012

 (2)  
Install the locks on the actuators of the leading edge slats (AMM 27-81-00/201).

 S 015-013

 (3)  
Remove the access panels from the bottom of the front of each wing.

 (AMM 12-30-00/201)Procedure
 S 215-014
 (1)  Do a visual check of the TAI duct.
 (a)  
Look for holes.

 (b)  
Look for loose brackets.

 S 865-015
 (2)  Do these steps if you use the APU to pressurize the TAI duct.
 (a)  
Start the APU (AMM 49-11-00/201).

 (b)  
Close the engine bleed valve.

 (c)  
Close the air-conditioning pack valves.

 (d)  
Make sure the isolation valve is in the OPEN or the AUTO position.

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