ASN Wikibase Occurrence # 134117
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| Date: | Sunday 2 March 1997 |
| Time: | 18:50 LT |
| Type: |  Beechcraft J35 Bonanza |
| Owner/operator: | Rafael L. Valenzuela |
| Registration: | N39W |
| MSN: | D-5353 |
| Total airframe hrs: | 4435 hours |
| Engine model: | Continental IO-470-C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Morristown, AZ -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Bullhead City, AZ (KIFP) |
| Deer Valley, AZ (KDVT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While in cruise flight the pilot felt a slight vibration and immediately made a power change without affect. After reducing the engine rpm from 2300 to 2100, the airplane vibrated hard for a split second and then smoothed out. At that point, the propeller had separated from the engine with part of the crankshaft. Metallurgical examination of the crankshaft revealed that the fatigue failure occurred inside the crankshaft bore 1.7 inches forward of the crankshaft oil seal. The point of origin was at two corrosion pits.
Probable Cause: failure of the crankshaft due to improper inspection/overhaul procedures.
Accident investigation:
 |
|
Sources:
NTSB LAX97LA116
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 08-Apr-2024 16:42 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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