CUB CRAFTERS
SECTION 3
CC11-100
EMERGENCY PROCEDURES
Issued: 08/01/06
REPORT SC10000AFM
Date of Revision: 11/23/18
Page number: 3-23
3.4.10 ALTERNATOR FAILURE
Alternator output failure can be caused by a mechanical
failure of the alternator, a momentary over-voltage
condition, or other reasons.
A zero or negative reading on the ammeter (if installed),
or less than 12.0
V
on the voltmeter (if installed), can
indicate alternator output failure. The alternator circuit
breaker may trip. A mechanical failure of the alternator
may be accompanied by unusual sounds coming from
the engine compartment. The first step is to reduce the
electrical load to a minimum.
NOTE
Duration of the battery is dependent on the condition of
the battery at the time of the failure and the electrical load
being demanded.
Turn the master switch OFF for at least one second.
Turn the master switch ON. Check that the ammeter
shows a POSITIVE indication (if installed), or voltmeter
shows greater than 12.0
V
(if installed).
If the alternator returns on line, continue flight, monitor
the ammeter or voltmeter (if installed) 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.
