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| NTSB Identification: FTW90LA057. The docket is stored on NTSB microfiche number 41486. |
| Accident occurred Sunday, January 21, 1990 at GOLIAD, TX |
| Aircraft: CESSNA 172M, registration: N9892Q |
| Injuries: 1 Uninjured |
| Event: 20001212X22425 Status: Final Report Approved On Tuesday, September 29, 1992 |
| NTSB Final Narrative (6120.4) |
| THE PILOT, WHO HAD BORROWED THE AIRPLANE REPORTED THAT HE WAS IN CRUISE FLIGHT AT 1,500 FEET MSL, LOOKING AT PROPERTY, WHEN THE ENGINE BACKFIRED AND STARTED TO 'SPUTTER.' SWITCHING TANKS AND APPLYING CARBURETOR HEAT FOR AN UNDETERMINED TIME DID NOT ALLEVIATE THE PROBLEM. THE PILOT ELECTED TO EXECUTE A PRECAUTIONARY LANDING ON A RANCH ROAD. DURING THE LANDING ROLL, THE RIGHT WING STRUCK A TREE AND VEERED RIGHT, CAUSING THE LEFT WING TO STRIKE THE GROUND. THE OWNER RECOVERED THE AIRPLANE AND STATED THAT THE ENGINE OPERATED NORMALLY THROUGHOUT 2 STARTS, RUN UPS, AND THE SUBSEQUENT TAKEOFF AND FLIGHT. THE TEMPERATURE/DEW POINT CONDITIONS THAT EXISTED AT THE TIME OF THE ACCIDENT WERE CONDUCIVE TO THE FORMATION OF CARBURETOR ICE AT CRUISE AND GLIDE POWER SETTINGS. |
| NTSB Probable Cause Narrative |
| THE PILOT IN COMMAND'S FAILURE TO IDENTIFY AND CORRECT FOR CARBURETOR ICING CONDITIONS WHICH EXISTED AT THE TIME OF THE ACCIDENT AND PRECIPITATED THE PRECAUTIONARY LANDING. |
| Occurrences and Sequence of Events |
| Occurrence: 1, LOSS OF ENGINE POWER(PARTIAL) - NONMECHANICAL |
| Phase of Operation: MANEUVERING |
| Sequence of Events for Occurrence Number: 1 |
| 1 ( Factor ) WEATHER CONDITION / CARBURETOR ICING CONDITIONS / (0) |
| 2 ( Cause ) CARBURETOR HEAT / IMPROPER USE OF / PILOT IN COMMAND |
| Occurrence: 2, ON GROUND/WATER COLLISION WITH OBJECT |
| Phase of Operation: LANDING - ROLL |
| Sequence of Events for Occurrence Number: 2 |
| 1 (Finding) PRECAUTIONARY LANDING / PERFORMED / PILOT IN COMMAND |
| 2 (Finding) OBJECT / TREE(S) / (0) |
| 3 ( Factor ) TERRAIN CONDITIONS / NONE SUITABLE / (0) |
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