Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 90

CESSNA
MODEL 172S NAV III
SECTION 3
EMERGENCY PROCEDURES
SYSTEM
SUPPLY ELECTRICAL POWER
MALFUNCTIONS
(Continued)
IF LOW VOLTS ANNUNCIATOR REMAINS ON (Continued)
9. Land as soon as practical.
NOTE
Make sure a successful landing is possible before
extending flaps. The flap motor is a large electrical
load during operation.
AIR DATA SYSTEM FAILURE
RED X - PFD AIRSPEED INDICATOR
1. ADC/AHRS Circuit Breakers - CHECK IN (ESS BUS and
AVN BUS 1). If open, reset (close) circuit breaker. If circuit
breaker opens again, do not reset.
2. Standby Airspeed Indicator - USE FOR AIRSPEED
INFORMATION.
RED X - PFD ALTITUDE INDICATOR
1. ADC/AHRS Circuit Breakers - CHECK IN (ESS BUS and
AVN BUS 1). If open, reset (close) circuit breaker. If circuit
breaker opens again, do not reset.
2. Standby Altimeter - CHECK current barometric pressure
SET. USE FOR ALTITUDE INFORMATION.
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172SPHAUS-03
U.S. 3-19