NTSB Identification: SEA92LA134.
The docket is stored on NTSB microfiche number 47122.
Accident occurred Thursday, June 25, 1992 in RONAN, MT
Probable Cause Approval Date: 08/31/1993
Aircraft: CESSNA A185F, registration: N4690C
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 PILOT HAD EXPERIENCED A POWER LOSS UPON POWER REAPPLICATION FOLLOWING IDLE OPERATION SUBSEQUENT TO LANDING ON SEVERAL PREVIOUS OCCASIONS. AFTER DISCUSSING THE SYMPTOMS WITH A MECHANIC, AND DECIDING THAT THE FUEL CONTROL SYSTEM REQUIRED ADJUSTMENT, THE PILOT INITIATED A FLIGHT TO THE MECHANIC'S FACILITY TO CARRY OUT THE INTENDED MAINTENANCE WORK. SHORTLY AFTER DEPARTING FOR THE MECHANIC'S AIRSTRIP, AND AT THE COMPLETION OF A 360 DEGREE SPIRALLING DESCENT TO LOSE ALTITUDE PRIOR TO LANDING, THE PILOT REAPPLIED POWER, EXPERIENCED A SURGE AND THEN LOST ENGINE POWER. HE EXECUTED A FORCED LANDING ON SOFT TERRAIN DURING WHICH THE LEFT MAIN GEAR SEPARATED AFTER THE GEAR BEGAN TO DIG IN DURING THE LANDING ROLL. THE FUEL CONTROL METERING UNIT HAD BEEN REPAIRED IN APRIL OF 1991 PRIOR TO THE AIRCRAFT'S SALE AND RELOCATION FROM NEW MEXICO TO MONTANA IN NOVEMBER 1991.

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

THE PILOT'S OPERATION WITH KNOWN DEFICIENCIES IN EQUIPMENT AND ERRATIC OPERATION OF THE FUEL CONTROL SYSTEM. A FACTOR CONTRIBUTING TO THE ACCIDENT WAS: SOFT TERRAIN.

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