(9) Use following procedure as alternate method of
(a) Remove exhaust stacks at cylinder outlet.
(b) Install cylinder exhaust outlet cover between
exhaust stack opening and exhaust stack flange.
stacks have stacks removed and a
flange and cylinder exhaust outlet.
(c) Fabricate covers locally.
(10) Seal all openings such as distributor vents and
engine breathers with moisture proof plugs and covers
Pressure sensitive tape, Federal Specification PPP-T-
60, (red) may be used
(11) Cover all engines installed on aircraft using
engine covers furnished with aircraft. Provide lower
portion of cover with a drain hole to prevent
accumulations of water.
(12) Locally fabricate placard for engines with
propellers installed, and conspicuously display placard
on propeller blade. Placard shall have following
DO NOT TURN PROPELLER
ENGINE PRESERVED IN ACCORDANCE
WITH APPLICABLE MAINTENANCE INSTRUCTIONS
e. Flyable Storage. Engine installed on aircraft which
will not be flown for an Indefinite period of time, but are
maintained in a flyable status or undergoing short-term
maintenance, shall be treated as follows:
(1) Engine serviced with normal lubricant shall be
given a ground runup each third day of Idleness.
operation at a speed greater than idle
for a period of 5 minutes or until
temperature is attained. Every 14
days a 15-minute normal ground
preflight shall be accomplished.
(2) Engines undergoing repair or inspection that
cannot be operated shall be pulled through by hand or
starter at least eight revolutions on the third day of
accomplished on the seventh day of
idleness. When runup cannot be
accomplished on the seventh day,
through and cylinders sprayed as
outlined in paragraph 7-11b. Storage
of aircraft engines in this manner
shall not exceed 14 days.
(3) Upon conclusion of a ground runup on engines
In flyable storage, make entries on applicable DA Forms
maintenance manual for specific
7-13. Depreservatlon of Reciprocating Engines.
The instructions contained In this section shall be
followed prior to making the initial start to newly installed
engines and engines installed in aircraft being removed
from temporary and Indefinite storage, regardless of
time In storage.
Newly installed engines shall be
given a depreservation run as soon
as possible, but not later than 4
accomplished. If more than 4 hours
has elapsed since preoiling engine,
complete preoiling procedure shall
again be accomplished.
a. Preoiling. Proper preoiling lubricates internal gears
and bearings, expels air from internal oil passages, and
averts internal engine failures due to lack of lubrication.
Accomplish preoiling either indoors or by applying
engine preheat prior to preoiling when operating in
temperature below 0°F (-18
°C). For preoiling engines
on aircraft using the diverter-segregator oil system, it is
necessary to follow special instructions contained in
applicable aircraft maintenance manual. Preoil using
the following procedures: