NTSB Identification: ATL85LA200.
The docket is stored on NTSB microfiche number 28338.
Accident occurred Sunday, June 30, 1985 in HATTERAS, NC
Aircraft: AMERICAN AA-1A, registration: N6393L
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.

WHILE ON A FLT TO HATTERAS, NC, THE ENG RAN ROUGH, SO AFTER LANDING, THE PLT GOT AN AUTO MECHANIC TO REMOVE THE SPARK PLUGS. THE LOWER PLUGS ON THE LEFT SIDE WERE LEAD FOWLED & WERE CLEANED WITH A WIRE BRUSH. DURING TAKEOFF ON THE NEXT FLT, THE ENG LOST PARTIAL POWER SHORTLY AFTER LIFT-OFF. THE PLT WANTED TO LAND ON A BEACH STRAIGHT AHEAD, BUT THERE WAS A RAIN SHOWER & REDUCED VISIBILILITY IN THAT DIRECTION. THEREFORE, HE REMAINED IN THE TRAFFIC PATTERN, BUT WAS UNABLE TO CLIMB ABOVE 200 FT. WHILE MANEUVERING FOR ALIGNMENT WITH THE RWY, HE MADE A STEEP TURN & LOST ALTITUDE. SUBSEQUENTLY, THE ACFT CRASH LANDED SHORT OF THE RWY. AN EXAM OF THE ENG REVEALED LEAD BUILD-UPS ON THE SPARK PLUGS & LOW COMPRESSION IN THE #1 & #4 CYLINDERS. WHILE AT HATTERAS, THE ACFT HAD BEEN SERVICED WITH AUTO FUEL, BUT IT DID NOT HAVE AN STC FOR AUTO GASOLINE.

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

MAINTENANCE..INADEQUATE

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

ENGINE ASSEMBLY,OTHER..LOW COMPRESSION

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

IGNITION SYSTEM,SPARK PLUG..LEADED


Contributing Factors

WEATHER CONDITION..RAIN



Contributing Factors

FLUID,FUEL GRADE..IMPROPER


Contributing Factors

AIRCRAFT SERVICE..IMPROPER..PILOT IN COMMAND

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