(a) Inspect for holes, cracks, and loose components.
SUBTASK 30-11-00-840-001
(2) Supply pneumatic pressure for the ducts.
(a) To use the APU to pressurize the TAI duct, do this task: Supply Pressure to the
Pneumatic System with the APU, TASK 36-00-00-860-803.
(b) To use an external air supply to pressurize the TAI duct, do this task: Supply Pressure to
the Pneumatic System with an External Ground Air Source, TASK 36-00-00-860-802.
(c) Put the BLEED 1 and 2 switches on the air conditioning panel to the OFF position.
(d) Put the L PACK and R PACK switches on the air conditioning panel to the OFF position.
(e) Make sure the ISOLATION VALVE switch is in the OPEN or the AUTO position.
SUBTASK 30-11-00-860-011
CAUTION
DO NOT KEEP THE WING TAI VALVE OPEN FOR MORE THAN 30 SECONDS
WHEN THE PNEUMATIC SYSTEM IS PRESSURIZED. IF IT IS OPEN FOR
MORE THAN 30 SECONDS, THE HOT AIR CAN CAUSE DAMAGE TO THE
WING LEADING EDGE.
(3) Put the WING ANTI-ICE switch to the ON position.
SUBTASK 30-11-00-200-001
(4) Do this check for leaks from the TAI duct:
WARNING
DO NOT TOUCH THE TAI DUCT. THE DUCT CAN GET VERY HOT. IF
YOU TOUCH THE DUCT YOU MAY GET BURNED.
(a) Move your hand near the TAI duct to feel for leaks.
1) Some leakage along duct seals and joints is satisfactory.
2) Leaks which can be felt 12 in. (305 mm) or more away are not satisfactory.
SUBTASK 30-11-00-720-006
(5) Put the WING ANTI-ICE switch to the OFF position.
G. Put the Airplane Back to Its Usual Condition
SUBTASK 30-11-00-860-012
(1) Do this task to remove pneumatic pressure from the ducts: Remove Pressure from the
Pneumatic System, TASK 36-00-00-860-806.
SUBTASK 30-11-00-410-003
(2) Close these access panels:
Number Name/Location
521AB Outboard Leading Edge Blowout Door - Slat Station 20.04
621AB Outboard Leading Edge Blowout Door - Slat Station 20.04
SUBTASK 30-11-00-860-013
(3) If electrical power is not necessary, do this task: Remove External Power,
TASK 24-22-00-860-814.
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-11-00
Page 509
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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