ASN Wikibase Occurrence # 356465
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| Date: | Thursday 21 November 1996 |
| Time: | 19:30 LT |
| Type: |  Cessna 172N |
| Owner/operator: | Air Horizons Inc |
| Registration: | N4926G |
| MSN: | 17273473 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 8198 hours |
| Engine model: | Lycoming O-320-H2AD |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Andover, MA -
 United States of America
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | Beverly, MA (KBVY) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The purpose of the local night flight, was to conduct a traffic report. During cruise flight, about 1,500 feet above mean sea level, the engine lost power. The pilot's attempts to restore power were unsuccessful, and the engine continued to lose power. Subsequently, the pilot performed a forced landing, during which the airplane impacted trees. Examination of the engine revealed that it was equipped with a Bendix D3000 magneto, a dual magneto with a common shaft. No spark was observed when the magneto was rotated. Disassembly of the magneto revealed that the cam followers were worn, which prevented the cam lobes from contacting the followers, and subsequently, prevented the points from operating.
Probable Cause: failure of the dual magneto, which resulted in a total loss of engine power, and subsequent collision with trees during a forced landing at night. Darkness and trees in the emergency landing area were related factors.
Accident investigation:
 |
|
Sources:
NTSB NYC97FA019
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 07:29 | ASN Update Bot | Added |
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