NTSB Identification: SEA85LA204.
The docket is stored on NTSB microfiche number 28404.
Accident occurred Wednesday, August 28, 1985 in BONNER'S FERRY, ID
Aircraft: WELCH AVID FLYER, registration: N64LW
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PLT REPORTED THAT DURING TAKEOFF, THE ENG SEIZED AS THE ACFT WAS CLIMBING THRU ABOUT 350 FT AGL OVER THE END OF THE RWY. HE STATED THAT THE ACFT WAS IN A MAXIMUM CLIMB WHEN THE ENG SEIZED & IMMEDIATELY WENT INTO A POWER OFF STALL. HE RECOVERED FROM THE STALL, BUT THERE WERE TREES AHEAD. WHILE MANEUVERING TO AVOID THE OBSTACLES, THE ACFT TOUCHED DOWN IN A SKID & THE RIGHT MAIN GEAR COLLAPSED. THE ACFT HAD A 2 CYLINDER, 2 CYCLE, 43 HP ENG THAT WAS EQUIPPED WITH 2 CARBURETORS & A SINGLE IGNITION SYSTEM. AN EXAM OF THE ENG REVEALED THAT THE MIXTURE FOR THE #1 CARBURETOR HAD BECOME LEAN WHICH ALLOWED THE #1 CYLINDER TO OVERHEAT. SUBSEQUENTLY, THE PISTON IN THE #1 CYLINDER SEIZED AS THE ACFT WAS CLIMBING AFTER TAKEOFF.

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

FUEL SYSTEM,CARBURETOR..IMPROPER

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

ENGINE ASSEMBLY,CYLINDER..OVERTEMPERATURE

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

ENGINE ASSEMBLY,PISTON..BINDING(MECHANICAL)


Contributing Factors

AIRSPEED..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..HIGH OBSTRUCTION(S)



Contributing Factors

STALL..INADVERTENT..PILOT IN COMMAND

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