Flight In Known Icing Visual Cues - Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual

SECTION 2
OPERATING LIMITATIONS
OTHER LIMITATIONS

FLIGHT IN KNOWN ICING VISUAL CUES

As Required by AD 96-09-15, Paragraph (a) (1)
Severe icing may result from environmental
conditions outside of those for which the airplane
is certificated. Flight in freezing rain, freezing
drizzle, or mixed icing conditions (supercooled
liquid water and ice crystals) may result in ice
build-up on protected surfaces exceeding the
capability of the ice protection system, or may
result in ice forming aft of the protected surfaces.
This ice may not be shed using the ice protection
systems,
performance and controllability of the airplane.
During flight, severe icing conditions that exceed those for which the
airplane is certificated shall be determined by the following visual cues.
If one or more of these visual cues exists, immediately request priority
handling from Air Traffic Control to facilitate a route or an altitude
change to exit the icing conditions.
1. Unusually extensive ice is accreted on the airframe in areas not
normally observed to collect ice.
2. Accumulation of ice on the upper or lower surface of the wing aft
of the protected area.
3. Heavy ice accumulations on the windshield, or when ice forms aft
of the curved sections on the windshield.
4. Ice forms aft of the protected surfaces of the wing struts.
Since the autopilot may mask tactile cues that indicate adverse
changes in handling characteristics, use of the autopilot is prohibited
when any of the visual cues specified above exist, or when unusual
lateral trim requirements or autopilot trim warnings are encountered
while the airplane is in icing conditions.
2-38
(Continued)
WARNING
and may seriously
U.S.
CESSNA
MODEL 208B (867 SHP)
GARMIN G1000
degrade the
FAA APPROVED
208BPHCUS-00