Cub Crafters CC18-180 Pilot Operating Handbook page 69

CUB CRAFTERS SECTION 3
CC18-180 EMERGENCY PROCEDURES
3.4.10 ALTERNATOR FAILURE
Alternator output failure can be caused by a mechanical
failure of the alternator, a momentary over voltage
condition, a failed alternator drive belt or other reasons.
A zero or negative reading on the ammeter may indicate
alternator output failure and the discharge light will
illuminate when the voltage drops below 12.6 volts. The
alternator circuit breaker may trip. Failure of the alternator
drive belt or a mechanical failure of the alternator may be
accompanied by unusual sounds emanating from the
engine compartment, possibly accompanied by a hot,
rubber-like odor.
The first step is to reduce the electrical load to minimum.
If the ammeter reading is positive, the alternator is
delivering electrical power. If the ammeter continues to
give a negative reading, this is an indication that the
alternator has failed.
Turn the battery master switch OFF. Check that all circuit
breakers are in and wait for at least ten seconds. Turn
the battery master switch ON. Check that the ammeter
shows a POSITIVE indication. If the alternator returns on
line, continue flight, monitor the ammeter and have the
system checked after landing. If the alternator does not
return on line, reduce electrical load to the minimum
required for safe flight by switching off all non-essential
systems. Maintain only the equipment required to provide
information for safe flight.
Land AS SOON AS IS PRACTICAL and conduct
appropriate repairs.
CAUTION
Duration of the battery is dependent on the condition
of the battery at the time of the failure and the
electrical load being demanded.
Issued: 05/31/05 REPORT TC10000AFM
Date of Revision: 11/20/12 Page Number: 3-23