ASN Wikibase Occurrence # 362167
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| Date: | Friday 23 April 1993 |
| Time: | 09:15 LT |
| Type: |  Cessna 172N |
| Owner/operator: | Silverwest Aviation |
| Registration: | N6292D |
| MSN: | 17272698 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 4309 hours |
| Engine model: | LYCOMING O-320-H2AD |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Needles, CA -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Bullhead City, AZ (P06 |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While approaching the destination airport a total loss of engine power was experienced. The pilot made a forced landing on rough terrain and the airplane nosed over about 200 yards short of the runway threshold. An examination of the engine, which had been operated for 2,184 hours since last being overhauled in 1984, revealed its single drive dual Bendix magneto had internally failed. The magneto had a total time of about 4,309 hours and was 14 years old. No log book evidence was found indicating it had ever been overhauled. Internal exam of the magneto revealed that the bearing stack around the rotating magnet shaft was devoid of lubrication and the bearings did not rotate freely. The breaker cam was bluish in color and coked with cam follower material. The cam followers had decreased in size to the point that the points did not open. The operator had performed the last two inspections, and had not complied with Bendix's suggested four year magneto overhaul schedule as published in FAA and Bendix bulletins. The operator stated that he only obtained bulletins when adopted by regulation into airworthiness directives. Bendix reported that bearing lubricants deteriorate beyond their useful life in four years.
Probable Cause: the total loss of engine power due to the failure of the magneto in the ignition system. The magneto failure resulted from the operator's lack of voluntary compliance with the manufacturers suggested overhaul cycle.
Accident investigation:
 |
|
Sources:
NTSB LAX93LA183
History of this aircraft
Other occurrences involving this aircraft
| 29 July 1982 | N6292D | Aero Squadron | 0 | Columbus, OH | |
min |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Mar-2024 18:27 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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