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| NTSB Identification: CHI92LA111. The docket is stored on NTSB microfiche number 46212. |
| Accident occurred Friday, March 13, 1992 at OLNEY, IL |
| Aircraft: CESSNA 177B, registration: N1271C |
| Event: 20001211X14263 Status: Final Report Approved On Thursday, July 29, 1993 |
| NTSB Final Narrative (6120.4) |
| THE AIRPLANE WAS IN CRUISE FLIGHT AT 4,000 FEET MSL IN IMC AND HEAVY SNOW WHEN THE ENGINE LOST POWER. RESTART AND |
| EMERGENCY PROCEDURES WERE UNSUCCESSFUL, AND A FORCED LANDING WAS MADE IN A FARM FIELD. THE AIRPLANE NOSED OVER |
| DURING THE LANDING ROLL. POST-ACCIDENT EXAMINATION REVEALED NO EVIDENCE OF PRE-IMPACT MECHANICAL MALFUNCTION. |
| WEATHER CONDITIONS WERE CONDUCIVE TO SERIOUS INDUCTION SYSTEM ICING AT CRUISE POWER SETTINGS. |
| NTSB Probable Cause Narrative |
| THE PILOT'S FAILURE TO SELECT CARBURETOR HEAT IN A TIMELY MANNER, AND THE TOTAL LOSS OF ENGINE POWER DUE TO |
| CARBURETOR ICE. RELATED FACTORS ARE CARBURETOR ICING CONDITIONS, REDUCED VISIBILITIES IN SNOW, LOW CEILINGS, THE DARK |
| NIGHT, AND SOFT TERRAIN CONDITIONS. |
| Occurrences and Sequence of Events |
| Occurrence: 1, LOSS OF ENGINE POWER(TOTAL) - NONMECHANICAL |
| Phase of Operation: CRUISE - NORMAL |
| Sequence of Events for Occurrence Number: 1 |
| 1 ( Factor ) WEATHER CONDITION / CARBURETOR ICING CONDITIONS / (0) |
| 2 ( Cause ) CARBURETOR HEAT / NOT SELECTED / PILOT IN COMMAND |
| 3 ( Cause ) FUEL SYSTEM, CARBURETOR / ICE / (0) |
| Occurrence: 2, FORCED LANDING |
| Phase of Operation: DESCENT - EMERGENCY |
| Phase of Operation: LANDING - ROLL |
| Sequence of Events for Occurrence Number: 3 |
| 1 ( Factor ) WEATHER CONDITION / LOW CEILING / (0) |
| 2 ( Factor ) WEATHER CONDITION / SNOW / (0) |
| 3 ( Factor ) LIGHT CONDITION / DARK NIGHT / (0) |
| 4 (Finding) VISUAL LOOKOUT / RESTRICTED / PILOT IN COMMAND |
| 5 ( Factor ) TERRAIN CONDITIONS / SOFT / (0) |
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