NTSB Identification: ANC84LA181.
The docket is stored on NTSB microfiche number 26377.
Accident occurred Sunday, September 16, 1984 in SKWENTNA, AK
Aircraft: CESSNA 152 II, registration: N94505
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.

FBO HAD BEEN EXPERIENCING DIFFICULTIES WITH SPARK PLUGS AND MAGNETOS IN THIS ACFT. THE PLT HAD FLOWN THIS ACFT BEFORE WITH RECURRENT ROUGH RUNNING AND DIMINISHED POWER SYMPTOMS. ENG BEGAN TO RUN ROUGH ON THIS FLT AND PLT LANDED ON A SAND BAR (MARKED FOR ACFT USE) TO CHECK IGNITION LEADS AND FUEL FOR CONTAMINATION. ON TAKEOFF, TOTAL POWER LOSS WAS EXPERIENCED AS THE ACFT REACHED ABOUT 2O FT AGL. PLT DITCHED THE ACFT IN THE RIVER. INVESTIGATION REVEALED THE MAGNETO BEARINGS WERE SEIZED. SERVICE BULLETIN RECOMMENDING REPLACEMENT OF BEARINGS HAD NOT BEEN COMPLIED WITH.

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

IGNITION SYSTEM,MAGNETO..BINDING(MECHANICAL)


Contributing Factors

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


Contributing Factors

MAINTENANCE,SERVICE BULLETIN/LETTER..NOT PERFORMED..FBO PERSONNEL

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