TM 1-1520-238-23
6-146
6.31.
ENGINE NOSE GEARBOX OIL JET FILTERS REMOVAL/INSTALLATION – continued
6.31.5. 4Inspection
NOTE
Unless otherwise specified, the following
inspection procedures apply to oil jet fil-
ter.
a. Check for cracks. None allowed.
b. Check hex head for torn lockwire holes. None
allowed.
NOTE
Oil jet filter sealing surface consists of
bottom of hex head and adjacent diameter.
c. Check packing grooves (6), sealing surface
(7), and screen (8) for any evidence of dam-
age.
(1) Repair minor surface imperfections measur-
ing 0.004 INCH or less deep and not exceed-
ing 20 percent of surface area by blending at
a 30:1 to 50:1 transition ratio. Do not exceed
depth of original damage.
d. Check for corrosion, scratches, nicks, and
gouges.
(1) Except for packing grooves and sealing sur-
face, repair minor damage measuring 0.030
INCH or less deep by blending.
e. Check filter port on oil jet for stripped,
crossed, or flattened threads.
(1) Minor damage is acceptable as long as it
does not exceed two threads and provided
that damage on thread does not exceed 1/3
of thread depth and 1/4 of thread circumfer-
ence. Yielded threads not allowed.
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