Loss Of Primary Instruments - Cub Crafters CC11-100 Pilot Operating Handbook

SECTION 3
EMERGENCY PROCEDURES
If the engine continues to run rough, it may indicate that
ice is accumulating on the propeller.
It is also good practice to apply carburetor heat prior to
and during an extended descent as a preventive
measure.
Ice accumulation on the wings and other airframe
components will greatly increase the stall speed of
the airplane and result in unpredictable flight
Ice accumulation over engine induction air inlet can
cause engine roughness and/or loss of power.
Ice formations on the propeller may cause severe
Ice accumulation over the pitot tube may cause
erroneous airspeed indications.
Ice build-up on the windshield will distort vision and
probably obscure forward visibility.

3.4.14 LOSS OF PRIMARY INSTRUMENTS

In the event of instrument failure, it is recommended to
return to the airfield and perform a normal landing, paying
very close attention to keep the airspeed well above stall
speed. If the airspeed indicator is not functioning, the
general feel and sound of the airplane should be used to
ensure an adequate airspeed is maintained for safe flight
and landing.
REPORT SC10000AFM
Page Number: 3-26
CAUTION
characteristics.
propeller/engine vibrations.
CUB CRAFTERS
CC11-100
Issued: 08/01/06
Date of Revision: 11/23/18