SECTION
8
CESSNA
HANDLING, SERVICE, AND
MAINTENANCEMODEL 208B (675 SHP)
PROLONGED OUT-OF-SERVICE
CARE
Prolonged out-of-service care applies to all airplanes which will not be
flown for an indefinite period (less than 60 days) but which are to be
kept ready to fly with the least possible preparation. If the airplane is to
be stored temporarily, or indefinitely, refer to the airplane Maintenance
Manual for proper storage procedures. The Maintenance Manual pro-
vides
am~lification for the following ~r0ced~reS:
1.
he
procedure to be follow>d for preservation of an engine in
service
de~ends on the Deriod of nactivitv and whetner or not the
engine
may be rotated dur.ng rhe nactiie period. The expected
Der od of inactivitv snould be esrablisned and reference made to
ihe Engine
preservation Schedule. The preservation carried out
should be recorded in the engine maintenance record and on
tags secured to the engine. The following preservation schedule
lists procedures to be followed:
CAUTION
UNDER NO CIRCUMSTANCES SHOULD
PRESERVATIVE OIL BE SPRAYED INTO THE
COMPRESSOR OR EXHAUST PORTS OF THE ENGINE.
DIRT PARTICLES DEPOSITED ON BLADES AND VANES
DURING ENGINE OPERATION
WILL ADHERE AND
ALTER THE AIRFOIL SHAPE, ADVERSELY AFFECTING
COMPRESSOR EFFICIENCY.
A.
0 to 7 Days -The engine may be lefl in an inactive state, with
no preservation protection, provided the engine is sheltered,
humidity is not excessively high, and the engine is not
subjected to extreme temperature changes that would
produce condensation.
B.
8
to 28 Days -An engine inactive for up to 28 days requires no
preservation provided all engine openings are sealed off and
relative humidity in the engine is maintained at less than
40
percent. Humidity control is maintained by placing desiccant
bags and a humidity indicator on wooden racks in the engine
exhaust duct. Suitable windows must be provided in the
exhaust closure to facilitate observation of the humidity
indicators.
(Continued Next Page)
1
8-52 U.S.
Revision 23
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