ASN Wikibase Occurrence # 358771
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| Date: | Wednesday 28 June 1995 |
| Time: | 07:55 LT |
| Type: |  Cessna 172P |
| Owner/operator: | Private |
| Registration: | N96567 |
| MSN: | 17276086 |
| Year of manufacture: | 1984 |
| Total airframe hrs: | 384 hours |
| Engine model: | LYCOMING O-320-D2J |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lake Placid, FL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | St. Petersburg, FL (KPIE) |
| West Palm Beach, FL | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT STATED THAT DURING CRUISE FLIGHT AT 5,000 FEET ABOUT AN HOUR AFTER DEPARTURE, THE ENGINE EXPERIENCED A LOSS OF POWER. MOMENTARY APPLICATION OF CARBURETOR HEAT RESTORED ENGINE POWER BUT THE ENGINE AGAIN FAILED. DURING THE FORCED LANDING THE AIRPLANE COLLIDED WITH TREES. EXAMINATION OF THE ENGINE REVEALED CRANKSHAFT, CAMSHAFT, AND VALVE TRAIN CONTINUITY. DIFFERENTIAL COMPRESSION OF ALL CYLINDERS USING 80 PSI AS A BASE REVEALED NUMBERS GREATER THAN 70 PSI. EACH MAGNETO TO ENGINE TIMING WAS DETERMINED TO BE CORRECT AND THE MAGNETOS WERE REMOVED FOR BENCH TESTING WHICH REVEALED THAT THE RIGHT MAGNETO WAS OPERATING NORMALLY. THE LEFT MAGNETO WAS FOUND TO BE FIRING INTERMITTENTLY DUE TO PARTIAL FAILURE OF THE IGNITION COIL. EXAMINATION OF THE FUEL VENT SYSTEM REVEALED THAT A VENTED FUEL CAP WAS FOUND SECURED BY CHAIN TO THE LEFT FUEL TANK FILLER PORT AND A NON- VENTED FUEL CAP WAS SECURED BY CHAIN TO THE RIGHT FUEL TANK PORT. THE CORRECT POSITIONS FOR VENTED AND NON-VENTED FUEL CAPS IS OPPOSITE FROM THE POSITIONS IN WHICH THEY WERE FOUND. ADDITIONALLY, A MALFUNCTION OF THE VENT VALVE ASSEMBLY WAS NOTED. THE VENT VALVE ASSEMBLY WAS NOT REMOVED FOR EXAMINATION. THE AIRPLANE HAD ACCUMULATED ABOUT 3.9 HOURS SINCE AN ANNUAL INSPECTION WAS PERFORMED ON APRIL 6, 1995.
Probable Cause: TOTAL FAILURE OF THE FUEL VENT SYSTEM RESULTING IN THE TOTAL LOSS OF ENGINE POWER DURING CRUISE FLIGHT. CONTRIBUTING TO THE ACCIDENT WAS THE INADEQUATE INSPECTION OF THE AIRPLANE DURING THE LAST ANNUAL INSPECTION FOR FAILURE OF THE MECHANIC TO IDENTIFY THAT THE VENTED AND NON-VENTED FUEL CAPS WERE INCORRECTLY POSITIONED.
Accident investigation:
 |
|
Sources:
NTSB MIA95LA165
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Mar-2024 18:02 | ASN Update Bot | Added |
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