SECTION 3
CESSNA
EMERGENCY PROCEDURES
MODEL 172S NAV III
ELECTRICAL POWER SUPPLY SYSTEM
MALFUNCTIONS
(Continued)
HIGH VOLTS ANNUNCIATOR COMES ON OR M BAT AMPS
MORE THAN 40 (Continued)
i.
COM1 and NAV1 - TUNE TO ACTIVE FREQUENCY
j.
COM1 MIC and NAV1 - SELECT (COM2 MIC and NAV2
will be inoperative once AVIONICS BUS 2 is selected to
OFF).
NOTE
When AVIONICS BUS 2 is set to OFF, the following
items will not operate:
KAP 140 Autopilot
GMA 1347 Audio Panel
COMM 2
NAV 2
GTX 33 Transponder
GDU 1040 MFD
k.
AVIONICS Switch (BUS 2) - OFF (KEEP ON if in
clouds)
3. 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.
(Continued Next Page)
3-16 U.S.
172SPHAUS-03