(b) Make sure each light comes on then goes off.
SUBTASK 30-21-00-860-004
(5) Make sure the engine and wing anti-ice panel commands the cowl TAI valves open:
(a) Put the ENG ANTI-ICE 1 switch in the ON position.
1) Make sure the left COWL VALVE OPEN light come on brightly for 1 to 3 seconds.
2) Make sure the COWL VALVE OPEN light is on dimly after 3 seconds.
3) Make sure the green TAI indication shows on the CDS (Common Display System)
display, above the left N1 speed display.
(b) Put the ENG ANTI-ICE 2 switch in the ON position.
1) Make sure the right COWL VALVE OPEN light come on brightly for 1 to 3 seconds.
2) Make sure the COWL VALVE OPEN light is on dimly after 3 seconds.
3) Make sure the green TAI indication shows on the CDS display above the right N1
speed display.
SUBTASK 30-21-00-860-005
(6) Make sure the engine and wing anti-ice panel commands the cowl TAI valves closed:
(a) Put the ENG ANTI-ICE 1 switch in the OFF position.
1) Make sure the left COWL VALVE OPEN light comes on brightly for 1 to 3 seconds.
2) Make sure the COWL VALVE OPEN light goes off after 3 seconds.
(b) Put the ENG ANTI-ICE 2 switch in the OFF position.
1) Make sure the right COWL VALVE OPEN light comes on brightly for 1 to 3 seconds.
2) Make sure the COWL VALVE OPEN light goes off after 3 seconds.
NOTE: If the COWL VALVE OPEN lights remain illuminated bright with engines at IDLE,
position APU BLEED air switch to OFF and increase thrust slightly (up to a maximum
of 30% N1).
SUBTASK 30-21-00-860-006
(7) If you used the engines to pressurize the TAI ducts, then stop the engines. To do this, do this
task: Stop the Engine Procedure (Usual Engine Stop), TASK 71-00-00-700-819-F00.
SUBTASK 30-21-00-860-009
(8) If you used the APU or external air to pressurize the TAI ducts, then, do this task: Remove
Pressure from the Pneumatic System, TASK 36-00-00-860-806.
SUBTASK 30-21-00-860-007
(9) Make sure the fuel shutoff levers are in the cutoff position and install DO-NOT-OPERATE tags.
SUBTASK 30-21-00-010-001
(10) For the right fan cowl panel, do this task: Open the Fan Cowl Panels,
TASK 71-11-02-010-801-F00.
SUBTASK 30-21-00-720-004
(11) Do this test of the left cowl TAI duct overpressure detection circuit:
(a) Disconnect the electrical connector from the left engine duct overpressure switch.
(b) Connect a jumper wire between pins 1 and 2 of the connector.
1) Make sure the left COWL ANTI-ICE light comes on.
(c) Remove the jumper wire from the connector.
(d) Re-connect the connector to the overpressure switch.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-21-00
Page 503
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
To Next Page
Loading...
