CAUTION
USE OF TOO MUCH THREAD LUBRICATING COMPOUND CAN CAUSE
CLOGGED VENTS AND ORIFICES.
(a) Apply a small quantity of Liqui-Moly NV Thread Compound, D50179 to the threads of all
male threaded parts.
(5) Install the honest orifice [4].
(a) Tighten the orifice 17 in-lb (2 N·m) to 20 in-lb (2 N·m).
(b) Make sure that there is a minimum of 0.015 in. (0.381 mm) gap around the honest orifice
head for sufficient airflow.
(6) Install the washer [3] and screw [2].
(a) Tighten the screw 6 in-lb (1 N·m) to 8 in-lb (1 N·m).
(7) Remove all of the thread lubricating compound that is remaining after assembly of the
threaded parts.
(8) Using MS20995C20 lockwire, G50225, lockwire both the screw and the orifice as one to the
housing.
H. Put the Airplane Back to Its Usual Condition
SUBTASK 30-21-11-860-020
(1) For the right fan cowl panel, do this task: Close the Fan Cowl Panels,
TASK 71-11-02-410-801-F00
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-21-11
Page 703
D633A101-ILF Feb 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL; AIRPLANES WITH ENGINE COWL TAI
VALVE P/N 3215618-5
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