TM 55-2840-251-23
Section VIII GENERAL MAINTENANCE PROCEDURES (Continued)
1-78 INSPECTION (Cont)
4. Oil Filter Metal Type Element (Cont)
h.
White Metal
(1)
On
first
discovery,
clean
oil
filter
('Paragraph 1-7.7) and recheck for contamination after
10 hours.
(2)
On second discovery of similar amount of
metal, clean oil filter, drain and change oil and recheck
after 10 hours.
(3)
On third inspection, if the same amount of
white metal continues to be generated, the engine
should be shipped to Depot Maintenance for inspection.
i.
Bronze or Steel
(1)
On first discovery, if there are less than
20 pieces of steel or bronze, clean filter (Paragraph 1-
77) and recheck for contamination after 5 to 10 hours.
(2)
On first discovery, if there are more than
20 pieces of steel or bronze, clean filter (Paragraph 1-
77), drain oil system and change engine oil (Paragraph
1-71. Perform ground run (Chapter 1, Section X) for
one hour and recheck.
(3)
If on recheck after one hour of ground
run, a greater quantity of steel or bronze is found, the
engine should be shipped to Depot Maintenance for
inspection.
(4)
If on recheck after one hour ground run, a
smaller quantity of metal is present, clean filter
(Paragraph 1-77) and recheck after 5 to 10 hours.
(5)
If recheck after 5 to 10 hours reveals
presence of similar quantity of steel or bronze metal, the
engine should be shipped to an Depot Maintenance for
inspection.
5. Chip Detectors If chip detector light has indicated
electrical continuity, proceed as follows:
a.
Remove chip detector (Paragraph 1-71).
b.
If only a single chain of metal slivers bridges
gap, clean (Paragraph 1-77) and reinstall detector.
c.
If more than 10 small particles are present
replace engine.
d.
If small amount of fuzz is present:
(1)
On first discovery, clean (Paragraph 1-77)
and recheck after 10 hours engine running.
(2)
On second discovery, repeat Step (1).
(3)
On third discovery, replace engine.
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