ASN Wikibase Occurrence # 298700
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| Date: | Wednesday 12 July 2000 |
| Time: | 16:40 LT |
| Type: |  Cessna 172N |
| Owner/operator: | Private |
| Registration: | N3392E |
| MSN: | 17271530 |
| Total airframe hrs: | 7407 hours |
| Engine model: | Lycoming O-320-H2AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | COLUMBUS, Texas -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | PALACIOS , TX (KPSX) |
| ROBINSON , TX (TE17) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Prior to takeoff, an initial check of the magnetos showed the right magneto had a drop of 300-500 rpm. The pilot rechecked the magnetos several times before and after takeoff and both magnetos checked 'normal.' After several minutes at cruise altitude, a drop in engine rpm was noted. A magneto check revealed a 'dead right magneto.' The pilot elected to change course to the closest airport with maintenance facilities. 'Soon thereafter, all power was lost,' and the pilot could not restart the engine. During the forced landing, 'the airplane hit the ground 30-60 feet from the first contact with the trees' and skidded another 25-50 feet before coming to rest on its nose. An engine test run was attempted; the engine would not start. The single-drive dual-magneto was removed from the engine, and a bench test revealed that no spark was being produced from either magneto. An examination of the magnetos revealed that the neoprene cam followers on both sets of points had melted and smeared, which kept the points from opening.
Probable Cause: the failure of both magnetos of the dual-magneto single-drive unit. A factor contributing to the accident was the lack of suitable terrain for the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW00LA207
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 21:37 | ASN Update Bot | Added |
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