Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 87

SECTION 3
EMERGENCY PROCEDURES
CESSNA
MODEL 172S NAV III
ELECTRICAL POWER SUPPLY SYSTEM
MALFUNCTIONS
(Continued)
IHIGH VOLTS ANNUNCIATOR COMES ON OR M BAT AMPS
MORE THAN 40
(Continued)
I
I
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
COMM2
GTX 33 Transponder
GMA 1347 Audio Panel
NAV2
GDU 1040 MFD
I
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.
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3-16 U.S.
172SPHAUS-03