F. Inspection/Check Procedure
SUBTASK 24-11-21-210-001
(1) With a flashlight (explosion proof flashlight, STD-1081) that is less than 6 inches long, access
the forward face of the cooler to shine the light through the cooler fins and look for these
conditions:
NOTE: Make sure that no bird debris are present (Foreign Object Damage - Inspection,
TASK 71-00-00-800-802-F00) prior to proceeding.
(a) Debris in the cooler fins
NOTE: The most likely area of damage is the forward facing surface of the cooler. You
will need a small hand held mirror (dental mirror, STD-3907) to see the forward
face of the cooler.
1) If you find debris, do this task: Integrated Drive Generator (IDG) Air/Oil Cooler -
Cleaning, TASK 24-11-21-100-801.
NOTE: If little to no light is seen through the cooler fins during the check with a
flashlight, this indicates that airflow is significantly obstructed and the
cooling capability could be diminished. The Cleaning Procedure may be
done to remove debris and improve airflow.
(b) Damage to the fins
1) Large dents and broken fins are not permitted. If you find them, do this task: IDG
AIR/OIL COOLER - REMOVAL/INSTALLATION, PAGEBLOCK 24-11-21/401.
NOTE: Large dents to the fins are specified as fins with sufficient damage to
prevent the correct air flow through the cooler, or fins that show signs of
deterioration or fins that cannot be put back to its initial shape. Broken fins
are specified as fins that are not attached to the top or bottom.
NOTE: If you find dents in the manifold section of the Air/Oil Cooler, make sure that
there are no dents with more than 0.090 in. (2.29 mm) in depth or have the
diameter of the dent more than 3 times the depth. If the dents are out of
these limits, speak to the manufacturer.
NOTE: If you find dents on attachment points, tubes, or areas of internal parts,
speak to the manufacturer.
(c) Oil stains or leakage
1) Oil stains or leakage are not permitted. If you find them, do this task: IDG AIR/OIL
COOLER - REMOVAL/INSTALLATION, PAGEBLOCK 24-11-21/401.
G. Put the Airplane Back to Its Usual Condition
SUBTASK 24-11-21-410-002
(1) Do this task: Close the Thrust Reverser (Selection), TASK 78-31-00-010-804-F00.
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-11-21
Page 202
D633A101-ILF Feb 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
To Next Page
Loading...
