NTSB Identification: ATL93LA147.
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Accident occurred Wednesday, August 25, 1993 in MCCAYSVILLE, GA
Probable Cause Approval Date: 10/20/1994
Aircraft: PIPER PA-22-108/U, registration: N5061Z
Injuries: 2 Minor.

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

A LAYER OF FOG PREVENTED AN EARLY TAKEOFF AS PLANNED BY THE PILOT. HE REFUELED THE AIRPLANE WITH 11 GALLONS OF AVIATION FUEL AND COMPLETED A PREFLIGHT INSPECTION. AFTER THE FOG CONDITION IMPROVED, THE PILOT COMPLETED A RUNUP AND ATTEMPTED A TAKEOFF. AS THE AIRPLANE ACCELERATED DOWN THE RUNWAY, THE PILOT ABORTED THE TAKEOFF DUE TO ENGINE PROBLEMS. HE RETURNED AND ATTEMPTED TO CORRECT THE ROUGH ENGINE CONDITION BY COMPLETING ANOTHER RUNUP PROCEDURE. IMMEDIATELY AFTER THE NORMAL RUNUP PROCEDURE WAS COMPLETED, WHICH INCLUDED THE CARBURETOR HEAT SYSTEM, THE PILOT ATTEMPTED ANOTHER TAKEOFF. AS THE AIRPLANE CLIMBED THROUGH 200 FEET AGL, THE ENGINE DEVELOPED A ROUGH CONDITION AGAIN. THE PILOT ATTEMPTED TO RESTORE FULL POWER WHICH INCLUDED THE APPLICATION OF CARB HEAT; THE PILOT MADE AN EMERGENCY LANDING IN NEARBY RIVER. EXAMINATION OF THE AIRCRAFT AND THE ENGINE ASSEMBLY FAILED TO DISCLOSE A MECHANICAL PROBLEM, OR A SUBSYSTEM MALFUNCTION; THE PILOT REPORTED NO PREVIOUS ENGINE PROBLEMS. WEATHER CONDITIONS AT THE NEAREST REPORTING SITE WERE FAVORABLE FOR THE FORMATION OF CARBURETOR ICE; THE PILOT RECEIVED A WEATHER BRIEFING BEFORE THE FLIGHT.

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

THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS.

Full narrative available

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