CIRCUIT BREAKERS
Most of the electrical circuits in the airplane are protected by push/pull type
circuit breakers installed on the aft face of the control pedestal. Should
an overload occur in any circuit, the applicable circuit breaker will trip,
causing an “open” in the circuit. After allowing the circuit breaker to cool for
approximately three minutes, it may be reset. If the circuit breaker repeatedly
trips when reset, there is likely a fault in the system and the circuit breaker
should be left in the open position.
GROUND SERVICE PLUG RECEPTACLE
A ground service plug receptacle is provided on the lower left portion of
the engine cowling, near the rewall. The ground service plug receptacle
allows for the use of an external power source for starting the engine in cold
environments and during maintenance procedures requiring lengthy work on
the electrical and avionics equipment.
The MCU provides circuit protection against polarity reversal and over-
voltage conditions from external power sources. If the plug is accidentally
connected backwards or the ground power voltage is too high, no power will
be connected to the electrical system, thereby protecting electrical equipment
from possible damage.
Figure 7-77 – Ground Service Receptacle
WARNING: Verify all circuit breakers are engaged (IN) prior to making
any ight. Never operate the aircraft with disengaged circuit breakers
without a thorough knowledge of the problem and possible consequences.
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