G. Prepare for the Installation
SUBTASK 30-21-11-860-016
(1) Make sure that these circuit breakers are open and have safety tags:
CAPT Electrical System Panel, P18-3
Row Col Number Name
A 6 C00148 ANTI-ICE & RAIN ENG 1 & WING CONT
A 7 C01001 ANTI-ICE & RAIN ENG 1 COWL AI VALVE
B 6 C00149 ANTI-ICE & RAIN ENGINE 2 CONTROL
B 7 C01002 ANTI-ICE & RAIN ENG 2 COWL AI VALVE
SUBTASK 30-21-11-820-001
(2) Look at the manual override knob [3] on the valve [5] and make sure the valve [5] is not in the
LOCKED closed position.
H. Engine Cowl TAI Valve Installation
SUBTASK 30-21-11-420-001
(1) Remove the protective covers from the ducts and the valve [5].
SUBTASK 30-21-11-210-001
(2) Examine the seal [2] as follows:
(a) Make sure the seal [2] do not have cracks, dents, or other damage.
(b) Replace all damaged seal [2] that you find.
SUBTASK 30-21-11-420-002
(3) Do these steps to install the valve [5]:
CAUTION
DO NOT APPLY TOO MUCH FORCE TO THE AFT DUCT. APPLY ONLY
ENOUGH FORCE TO MOVE THE AFT DUCT REARWARD
APPROXIMATELY 0.5 INCH (13 MM). IF YOU APPLY TOO MUCH FORCE,
YOU CAN DAMAGE THE AFT DUCT.
(a) If removed, install a temporary support between the aft duct and the fan case bracket to
move the aft duct rearward.
NOTE: You can install a temporary support between the fan case bracket and the aft
duct to hold the duct in this position. This will make the installation of the valve
easier.
(b) Install a seal [2] in the forward end of the valve [5] and on the aft duct flange.
(c) Install the valve [5] between the ducts.
NOTE: Make sure the flow arrow points forward and the locking feature on the
downstream flange is correctly engaged.
(d) Remove the temporary support between the aft duct and the fan case bracket.
(e) Loosely install the coupling [1] to attach the valve [5] to the ducts.
NOTE: Make sure the coupling nuts on the couplings are on top and the nuts face
outboard.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-21-11
Page 407
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
To Next Page
Loading...
