NTSB Identification: DEN82DA146
14 CFR Part 91: General Aviation
Accident occurred Sunday, July 25, 1982 in GUNNISON, CO
Probable Cause Approval Date: 07/25/1983
Aircraft: PIPER PA-23C-250, registration: N6383Y
Injuries: 2 Minor.

DURING TAKEOFF, THE PILOT WAS DISTRACTED BY INBOUND TRAFFIC AND DELAYED RETRACTING HIS GEAR. AT THE SAME TIME, THE ENGINES WERE NOT SYNCHRONIZED AND HE WAS HAVING DIFFICULTY GETTING THEM TO SOUND GOOD. HE THEN NOTICED THAT A FIRE HAD STARTED IN THE VICINITY OF THE LEFT ENGINE. THE LEFT ENGINE WAS SHUT DOWN AND FEATHERED, AND THE FIRE SUBSIDED. SINCE THE HYDRAULIC PUMP WAS ON THE LEFT ENGINE, THE HAND PUMP HAD TO BE USED TO RETRACT OR EXTEND THE LANDING GEAR. THE PILOT DELAYED PUMPING THE GEAR UP, THEN REALIZED HE WOULD BE UNABLE TO RETURN TO THE AIRPORT. SUBSEQUENTLY, HE LANDED IN A GRASSY AREA WITH THE GEAR RETRACTED. AN INVESTIGATION REVEALED FIRE DAMAGE IN THE VICINITY OF THE FUEL INJECTOR AND ALTERATOR. A FUEL LEAK WAS FOUND AT THE MIXTURE CONTROL VALVE, PN 2522591, WHERE THE O-RINGS AROUND THE VALVE STEM WERE WORN. ALSO, A TEARDOWN OF THE ALTERNATOR REVEALED THAT THE BRUSHES AND ARMATURE WERE WORN TO THE EXTENT THAT SPARKING COULD OCCUR, THE DENSITY ALTITUDE WAS ABOUT 8500 FT.

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

FUEL SYSTEM,INJECTOR..WORN

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

FLUID,FUEL..LEAK

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

EMERGENCY PROCEDURE..IMPROPER..PILOT IN COMMAND


Contributing Factors

GEAR RETRACTION..DELAYED..PILOT IN COMMAND


Contributing Factors

DIVERTED ATTENTION..PILOT IN COMMAND


Contributing Factors

ELECTRICAL SYSTEM,ALTERNATOR..WORN


Contributing Factors

WEATHER CONDITION..HIGH DENSITY ALTITUDE

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