Cessna 401 — Louis_Janos_401_Emergency1_checklist

ALTERNATOR FAILURE alternator_failure

indicated by illumination of failure light

• Reduce load
• If circuit breaker is tripped
• Shut off affected alternator.
• Reset affected alternator circuit breaker .
• Turn on affected alternator switch.
• If circuit breaker reopens, turn off alternator.
• If circuit breaker does not trip
• Select affected alternator on ammeter and monitor output.
• If output is normal and failure light remains on, disregard fail indication and have indicator checked after landing.
• If output is insufficient turn off alternator and reduce electrical load to one alternator capacity.
• If complete loss of alternator output occurs check field fuse and replace if necessary.
• If an intermittent light indication accompanied by ammeter fluctuation is observed - shut off affected alternator and reduce load to one alternator capacity.

ALTERNATOR FAILURE DUAL alternator_failure

• Reset over-voltage protector if out
• If still inoperative, switch to number 2 regulator
• If still inoperative:
• Shut off both alternator switches
• Shut off battery master switch
• Reduce electrical load to a minimum
• Turn on emergency power switch
• Turn on left alternator switch
• Turn on right alternator switch
• If still inoperative:
• Turn off emergency power switch
• Turn off both alternator switches
• Turn on battery master switch
• Prepare to terminate flight