Cessna 17273274 Pilot Operating Handbook page 167

CESSNA
MODEL 172N
down the tail by placing sand-bags, or suitable weights, on ea.ch side of the
horizontal stabilizer, next to the fuselage. If ground anchors are available,
the tail should be securely tied down.
Ensure that the nose will be held off the ground under all
conditions by means of suitable stands or supports under
weight supporting bulkheads near the nose of the airplane.
LEVELING
Longitudinal leveling of the airplane is accomplished by placing a
level on leveling screws located on the left side of the tailcone. Deflate the
nose tire and/ or lower or raise the nose strut to properly center the bubble
in the level. Corresponding points on both upper door sills may be used to
level the airplane laterally.
FLYABLE STORAGE
Airplanes placed in non-operational storage for a maximum of 30 days
or those which receive only intermittent operational use for the first 25
hours are considered in flyable storage status. Every seventh day during
these periods, the propeller should be rotated by hand through five
revolutions. This action "limbers" the oil and prevents any accumulation
of corrosion on engine cylinder walls.
For maximum safety, check that the ignition switch is
OFF, the throttle is closed, the mixture control is in the idle
cut-off position, and the airplane is secured before rotating
the propeller by hand. Do not stand within the a.re of the
propeller blades while turning the propeller.
After 30 days, the airplane should be flown for 30 minutes or a ground
runup should be made just long enough to produce an oil temperature
within the lower green arc range. Excessive ground runup should be
avoided.
Engine runup also helps to eliminate excessive accumulations of
water in the fuel system and other air spaces in the engine. Keep fuel tanks
full to minimize condensation in the tanks. Keep the battery fully charged
to prevent the electrolyte from freezing in cold weather. If the airplane is to
be stored temporarily, or indefinitely, refer to the Service Manual for
proper storage procedures.
1 July 1979
NOTE
I I
WARNING
SECTION 8
HANDLING, SERVICE
& MAINTENANCE
8-9