NTSB Identification: FTW92LA134.
The docket is stored on NTSB microfiche number 46671.
Accident occurred Thursday, May 14, 1992 in MOORELAND, OK
Probable Cause Approval Date: 07/26/1993
Aircraft: AIR TRACTOR AT-501, registration: N1006T
Injuries: 1 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.

THE PILOT STATED THAT THE ENGINE BACKFIRED SEVERAL TIMES AND LOST POWER AS HE WAS COMPLETING A TURN TO REVERSE DIRECTION AND LINING UP FOR A SWATH RUN. HE DUMPED THE CHEMICAL LOAD AND APPLIED FULL THROTTLE, MIXTURE, AND PROPELLER, BUT THE ACTIONS DID NOT ALLEVIATE THE POWER LOSS. HE ELECTED TO LAND ON A NEARBY RIDGE LINE. DURING THE LANDING ROLL, THE AIRPLANE COLLIDED WITH SEVERAL TREES AND ROUGH TERRAIN AND NOSED DOWN. EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER 2 CYLINDER HAD FAILED FOR UNDETERMINED REASONS. THE OPERATOR REPORTED THIS WAS THE FOURTH CYLINDER FAILURE THAT HE HAD EXPERIENCED ON THIS ENGINE SINCE A MAJOR OVERHAUL 710 HOURS PRIOR TO THE ACCIDENT.

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

THE FAILURE OF THE NUMBER 3 CYLINDER FOR UNDETERMINED REASONS. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR THE ENSUING FORCED LANDING.

Index for May1992 | Index of months