Loss Of Electrical Power - Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual

SECTION 3
EMERGENCY PROCEDURES
ELECTRICAL
MALFUNCTIONS

LOSS OF ELECTRICAL POWER

The design of the electrical power system, due to the self-exciting
feature of the generator and the multiple protected busing system,
minimizes the possibility of a complete electrical power loss. However,
a fault to ground on the generator or one of the battery cables can be
identified by one or more of the following: the amber GENERATOR
OFF annunciator coming on, sudden dimming of lights, contactor
chattering, open circuit breaker(s), or arching noises. Monitoring the
GEN AMPS, ALT AMPS, BAT AMPS, and BUS VOLTS indicators on
the ELECTRICAL section of the EIS Systems page will provide further
information concerning the location of the fault, or the system affected
by the fault. In the event of the above indications, the portion of the
system containing the fault should be isolated. Following the checklist
procedures for AMBER GENERATOR OFF ANNUNCIATOR COMES
ON should result in restoration of electrical power to the distribution
buses. The electrical section of the EIS Systems page should be
monitored to make sure that ground fault currents have been shutoff
and the capacity of the remaining power source(s) is not exceeded.
With the loss of electrical power the bleed air valve will
fail to the open position. Rotate the TEMP control knob
counterclockwise to as necessary to control cabin
temperature.
3-56
POWER
(Continued)
CAUTION
U.S.
MODEL 208B 867 SHP
GARMIN G1000
SUPPLY SYSTEM
FAA APPROVED
208BPHCUS-00
CESSNA