ENSTROM 280FX OPERATOR’S MANUAL 3-17
FAA Approved: Nov 26/13 Rev. 9
Report No. 28-AC-020 Nov 5/13
ELECTRICAL SYSTEM
3-16. Alternator Malfunction
A malfunction of the alternator will be indicated by zero
charge rate or constant discharge on the ammeter, or the
LOW VOLTAGE caution segment on later production
helicopter will illuminate. To put the alternator back on the
line, proceed as follows:
1. Alternator circuit breaker in.
2. Alternator excite circuit breaker in.
3. Cycle alternator switch.
4. If alternator is not restored or goes off the line again,
turn off all nonessential electrical equipment and land as
soon as practicable.
3-17. Starter Relay Light On
Later production helicopters are equipped with a STARTER
RELAY warning segment in the annunciator panel. This
light illuminates any time the main contacts of the starter
relay are closed. During normal operations, the only time
the light will illuminate is when the engine is being started.
Depending on the cause of the malfunction, there may be
significant power loss as the magnetos revert to the starting
configuration, that is, one magneto off and the other
running at retarded timing. If the STARTER RELAY light
illuminates when the engine is not being started, proceed as
follows:
1. Aircraft On Ground
a. Turn START switch/circuit breaker OFF.
(1) If light extinguishes, shut down the engine using
normal procedures and determine cause for the
light illumination.
(2) If light does not extinguish, proceed to next step.
b. Shut down the engine immediately.
c. Turn all electrical switches OFF.
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level of the 280FX Rotorcraft Flight Manual.
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