Section VIII GENERAL MAINTENANCE PROCEDURES (Continued)
1-78 INSPECTION (Cont)
4. Oil Filter Metal Type Element (Cont)
Examples of possible contaminants
- Small flakes of non-ferrous metal
bearings or bushings of babbit, tin,
bronze or silver.
- Small flakes of ferrous metal normally
originating from spalled anti-friction
bearings, gear teeth or fretting.
- Slivers of steel normally originating
from interference between steel parts
or from heavy scoring.
- Fuzz or powdered material is cast iron
and originates from the propeller shaft
oil transfer sleeve.
It can be assumed that less than 40 small particles of
discounted. In such cases the filter element should be
cleaned and reinstalled. It must also be considered that
new engines, or engines immediately after extensive
shop work, may produce metal contamination at the oil
filter. In such cases normal precautions apply. (Refer
to TB 43-0106).
In all instances of engine generated
metal contamination, there exists the
remaining in propeller and airframe oil
contribute to recontamination of newly
installed engine. When an engine is to
contamination of the oil system, all
airframe components associated with
propeller governors, tubes and hoses
should be flushed according to TM55-
Airframe oil coolers shall be replaced
in accordance with applicable airframe
manual. Engine oil-to fuel heaters and
governors shall be returned to Depot.
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