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| NTSB Identification: DEN86FA092. The docket is stored on NTSB microfiche number 30776. |
| Accident occurred Thursday, March 06, 1986 at ANACONDA, MT |
| Aircraft: CESSNA 177, registration: N3476T |
| Injuries: 3 Fatal, 1 Serious |
| Event: 20001213X33028 Status: Final Report |
| NTSB Final Narrative (6120.4) |
| THE SOLE SURVIVING PAX SAID THE ENG LOST POWER DURING CRUISE FLIGHT OVER MOUNTAINOUS TERRAIN. THE PLT ATTEMPTED A |
| FORCED LANDING BUT HIT A TREE AND THE ACFT CRASHED. APRX 5 GALS OF AUTOMOTIVE FUEL WERE DRAINED FROM WING TANK. FUEL |
| SAMPLE TAKEN FROM PLT'S STORAGE TANK REVEALED SOME WATER CONTAMINATION. ACFT HAD BEEN OPERATING AT 9000 FT MSL IN |
| BELOW FREEZING TEMP FOR APRX 1 HR, 5 MINS. ENG DISASSEMBLY REVEALED NO EVIDENCE OF FAILURE. CARBURETOR BOWL WAS |
| CLEAN, DRY, AND ABSENT OF FUEL. |
| 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 ( Cause ) FLUID, FUEL / CONTAMINATION / (0) |
| 2 ( Cause ) AIRCRAFT SERVICE / IMPROPER / PILOT IN COMMAND |
| 3 ( Cause ) FLUID, WATER / FROZEN / (0) |
| 4 ( Cause ) FLUID, FUEL / IMPROPER / (0) |
| Occurrence: 2, FORCED LANDING |
| Phase of Operation: DESCENT - EMERGENCY |
| Occurrence: 3, IN FLIGHT COLLISION WITH OBJECT |
| Phase of Operation: DESCENT - EMERGENCY |
| Sequence of Events for Occurrence Number: 3 |
| 1 ( Factor ) OBJECT / TREE(S) / (0) |
| Occurrence: 4, IN FLIGHT COLLISION WITH TERRAIN/WATER |
| Phase of Operation: DESCENT - UNCONTROLLED |
| Sequence of Events for Occurrence Number: 4 |
| 1 ( Factor ) TERRAIN CONDITIONS / MOUNTAINOUS/HILLY / (0) |
| 2 ( Factor ) TERRAIN CONDITIONS / NONE SUITABLE / (0) |
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