SECTION 3
CESSNA
EMERGENCY PROCEDURES
MODEL 172S NAV III
ICING
INADVERTENT ICING ENCOUNTER DURING FLIGHT
1. PITOT HEAT Switch - ON
2. Turn back or change altitude to obtain an outside air
temperature that is less conducive to icing.
3. Pull cabin heat control full out and open defroster
outlets to obtain maximum windshield defroster airflow.
Adjust cabin air control to get maximum defroster heat and
airflow.
4. Watch for signs of induction air filter icing. A loss of engine
RPM could be caused by ice blocking the air intake filter.
Adjust the throttle as necessary to hold engine RPM. Adjust
mixture, as necessary, for any change in power settings.
5. Plan a landing at the nearest airport. With an extremely
rapid ice build-up, select a suitable "off airport" landing site.
6. With an ice accumulation of 0.25 inch or more on the wing
leading edges, be prepared for significantly higher power
requirements, higher approach and stall speeds, and a
longer landing roll.
7. Leave wing flaps retracted. With a severe ice build-up on
the horizontal tail, the change in wing wake airflow direction
caused by wing flap extension could result in a loss of
elevator effectiveness.
8. Open left window and, if practical, scrape ice from a portion
of the windshield for visibility in the landing approach.
9. Perform a landing approach using a forward slip, if
necessary, for improved visibility.
10. Approach at 65 to 75 KIAS depending upon the amount of
the ice accumulation.
11. Perform a landing in level attitude.
12. Missed approaches should be avoided whenever possible
because of severely reduced climb capability.
(Continued Next Page)
3-12 U.S.
172SPHAUS-03
Содержание 172S Skyhawk SP NAV III 2005
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