SECTION 4
CESSNA
NORMAL PROCEDURES
MODEL 172S NAV III
PREFLIGHT INSPECTION
(Continued)
5 NOSE
1. Fuel Strainer Quick Drain Valve (Located on bottom of
fuselage) - DRAIN
Drain at least a cupful of fuel (using sampler cup) from valve
to check for water, sediment, and proper fuel grade before
each flight and after each refueling. If water is observed,
take further samples until clear and then gently rock wings
and lower tail to the ground to move any additional
contaminants to the sampling points. Take repeated samples
from all fuel drain points, including the fuel reservoir and
fuel selector, until all contamination has been removed. If
contaminants are still present, refer to WARNING below and
do not fly the airplane.
NOTE
Collect all sampled fuel in a safe container. Dispose
of the sampled fuel so that it does not cause a
nuisance, hazard, or damage to the environment.
WARNING
IF, AFTER REPEATED SAMPLING, EVIDENCE OF
CONTAMINATION STILL EXISTS, THE AIRPLANE
SHOULD NOT BE FLOWN. TANKS SHOULD BE
DRAINED AND SYSTEM PURGED BY QUALIFIED
MAINTENANCE PERSONNEL. ALL EVIDENCE OF
CONTAMINATION MUST BE REMOVED BEFORE
FURTHER FLIGHT.
2. Engine Oil Dipstick/Filler Cap - CHECK oil level, then check
dipstick/filler cap SECURE. Do not operate with less than
5 quarts. Fill to 8 quarts for extended flight.
3. Engine Cooling Air Inlets - CLEAR of obstructions.
4. Propeller and Spinner - CHECK for nicks and security.
5. Air Filter - CHECK for restrictions by dust or other foreign
matter.
6. Nosewheel Strut and Tire - CHECK for proper inflation of
strut and general condition of tire. (weather checks, tread
depth and wear, etc.)
7. Static Source Opening - CHECK (Verify opening is clear)
(Continued Next Page)
4-10 U.S.
172SPHAUS-03