NTSB Identification: ATL83FA009
Nonscheduled 14 CFR Part 135: Air Taxi & Commuter
Accident occurred Friday, October 08, 1982 in ALLENDALE, SC
Probable Cause Approval Date: 10/08/1983
Aircraft: BEECH 58, registration: N958MC
Injuries: 2 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

ABOUT 30 MIN AFTER DEPARTURE, ELECTRICAL EQUIPMENT BEGAN TO FAIL. THE PLT TURNED OFF THE ALTERNATOR & RESET WITH NO CHANGE. HE THEN SWITCHED TO THE #1 REGULATOR WHICH DID NOT CORRECT THE PROBLEM. WHILE TURNING ON DOWNWIND THE GEAR HANDLE WAS PLACED DOWN & ALL ELECT POWER WAS LOST. THE PLT THEN CRANKED THE GEAR DOWN UNTIL RESISTANCE WAS MET, BUT DID NOT COUNT THE NUMBER OF REVOLUTIONS. THE ACFT TOUCHED DOWN WITH PARTIALLY EXTENDED LANDING GEAR. BOTH BATTERIES WERE FOUND DRY. THE LEFT ALTERNATOR HAD NO OUTPUT & RIGHT ALTERNATOR CURRENT LIMITER WAS BURNED OPEN. THE PLT INDICATED DURING A SUBSEQUENT INTERVIEW THAT HE DID NOT TURN OFF ANY ELECTRICAL EQUIPMENT. HE ALSO STATED THAT HE HAD NOT EXERCISED THE EMERG LANDING GEAR SYSTEM IN FLIGHT PRIOR TO THIS MISHAP.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ELECTRICAL SYSTEM..FAILURE,TOTAL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

EMERGENCY PROCEDURE..NOT FOLLOWED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ELECTRICAL SYSTEM..IMPROPER USE OF..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

EMERGENCY PROCEDURE..NOT FOLLOWED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

GEAR DOWN AND LOCKED..NOT ATTAINED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

INADEQUATE TRAINING(EMERGENCY PROCEDURE(S))..PILOT IN COMMAND


Contributing Factors

ELECTRICAL SYSTEM,BATTERY..INADEQUATE


Contributing Factors

ELECTRICAL SYSTEM,BATTERY..DETERIORATED


Contributing Factors

ELECTRICAL SYSTEM,ALTERNATOR..INOPERATIVE


Contributing Factors

ELECTRICAL SYSTEM..OUTPUT LOW


Contributing Factors

MAINTENANCE,INSPECTION..INADEQUATE..COMPANY MAINTENANCE PERSONNEL

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