What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) PIC reported that the left engine developed an intermittent roughness followed by an annunciation light with a left alternator failure. About 15-30 seconds after the annunciation alternator light, the airplane had a complete electrical system failure. The left engine developed smoking coming from underneath the cowling. The engine was secured and an attempt to contact the hnl tower on a cell powered telephone, since all electrical power was lost. The landing gear would not extend and had to manually extend using emergency procedures. The PIC landed the airplane without any other problems. Maintenance findings: the mechanic has determined the starter relay burnt out and causing the starter to act as a generator. The starter relay failure caused the complete electrical system. The mechanic will submit an FAA form 8010-4 malfunction and defect report on the shorted starter relay.
As the FAA filed it
(-23) PIC REPORTED THAT THE LEFT ENGINE DEVELOPED AN INTERMITTENT ROUGHNESS FOLLOWED BY AN ANNUNCIATION LIGHT WITH A LEFT ALTERNATOR FAILURE. ABOUT 15-30 SECONDS AFTER THE ANNUNCIATION ALTERNATOR LIGHT, THE AIRPLANE HAD A COMPLETE ELECTRICAL SYSTEM FAILURE. THE LEFT ENGINE DEVELOPED SMOKING COMING FROM UNDERNEATH THE COWLING. THE ENGINE WAS SECURED AND AN ATTEMPT TO CONTACT THE HNL TOWER ON A CELL POWERED TELEPHONE, SINCE ALL ELECTRICAL POWER WAS LOST. THE LANDING GEAR WOULD NOT EXTEND AND HAD TO MANUALLY EXTEND USING EMERGENCY PROCEDURES. THE PIC LANDED THE AIRPLANE WITHOUT ANY OTHER PROBLEMS. MAINTENANCE FINDINGS: THE MECHANIC HAS DETERMINED THE STARTER RELAY BURNT OUT AND CAUSING THE STARTER TO ACT AS A GENERATOR. THE STARTER RELAY FAILURE CAUSED THE COMPLETE ELECTRICAL SYSTEM. THE MECHANIC WILL SUBMIT AN FAA FORM 8010-4 MALFUNCTION AND DEFECT REPORT ON THE SHORTED STARTER RELAY.
Other reports on N886DM · 1
Matched to the same aircraft by N-number and date.