NTSB Identification: LAX84LA229.
The docket is stored on NTSB microfiche number 25137.
Accident occurred Thursday, March 22, 1984 in LAKEPORT, CA
Aircraft: REPUBLIC RC-3, registration: N6470K
Injuries: 1 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.

THE PLT REPORTED THAT ON HIS PREFLIGHT HE FOUND THE ENG COMPRESSION & OIL LEVEL TO BE LOW BUT AFTER SERVICING THE OIL TO THE PROPER LEVEL HE DEPARTED & ON INITIAL CLIMB, AFTER REACHING ABOUT 100 FT AGL, THE ENG STARTED POPPING & LOSING RPM. THE PLT MADE A LEFT TURN TO AVOID OBSTACLES & LANDED IN A SMALL GRAPE VINEYARD. POST CRASH EXAMINATION OF THE ENG REVEALED LOW COMPRESSION & EXCESSIVE OIL CONSUMPTION DUE TO WEAR. THE ACFT HAD BEEN OPERATED WITH AUTOMOTIVE FUEL.

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

IGNITION SYSTEM,SPARK PLUG..CONTAMINATION

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

ENGINE ASSEMBLY,CYLINDER..LOW COMPRESSION

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

ENGINE ASSEMBLY,PISTON..WORN

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

ENGINE ASSEMBLY,VALVE,INTAKE..MOVEMENT RESTRICTED

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

MAINTENANCE..INADEQUATE..OTHER MAINTENANCE PERSONNEL

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

OPERATION WITH KNOWN DEFICIENCIES IN EQUIPMENT..INTENTIONAL..PILOT IN COMMAND


Contributing Factors

FLUID,FUEL GRADE..IMPROPER

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