Textron Aviation Cessna 172S NAV III Skyhawk SP, Information Manual

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CESSNA SECTION 3
MODEL 172S NAV III EMERGENCY PROCEDURES
KAP 140 AUTOPILOT
U.S.
ELECTRICAL POWER SUPPLY SYSTEM
MALFUNCTIONS
(Continued)
LOW VOLTS ANNUNCIATOR COMES ON BELOW 1000
RPM
1. Throttle Control - 1000 RPM
2. LOW VOLTS Annunciator - CHECK (verify annunciator is not
shown)
LOW VOLTS ANNUNCIATOR REMAINS ON AT 1000 RPM
3. Authorized maintenance personnel must do electrical system
inspection prior to next flight.
LOW VOLTS ANNUNCIATOR COMES ON OR DOES NOT
GO OFF AT HIGHER RPM
1. MASTER Switch (ALT Only) - OFF
2. ALT FIELD Circuit Breaker - CHECK IN
3. MASTER Switch (ALT and BAT) - ON
4. LOW VOLTS Annunciator - CHECK (verify annunciator is not
shown)
5. M BUS VOLTS - CHECK 27.5 V (minimum)
6. M BATT AMPS - CHECK CHARGING (+)
IF LOW VOLTS ANNUNCIATOR REMAINS ON
7. MASTER Switch (ALT Only) - OFF
8. Electrical Load - REDUCE IMMEDIATELY as follows:
a. AVIONICS Switch (BUS 1) - OFF
b. PITOT HEAT Switch - OFF
c. BEACON Light Switch - OFF
d. LAND Light Switch - OFF (use as required for landing)
e. TAXI Light Switch - OFF
f.
NAV Light Switch - OFF
g. STROBE Light Switch - OFF
h. CABIN PWR 12V Switch - OFF (if installed)
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172SPHAUS-05 3-19
For
Training
Purposes
Only