ASN Wikibase Occurrence # 278878
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| Date: | Monday 6 January 2020 |
| Time: | 14:09 LT |
| Type: |  Cessna 172H |
| Owner/operator: | Mondo Beyondo Thrill Squadron |
| Registration: | N1658F |
| MSN: | 17255053 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 9794 hours |
| Engine model: | Continental O-360-A4M |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | El Monte, California -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | El Monte, CA |
| El Monte, CA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that during the flight, the airplane suddenly vibrated severely followed by a sudden loss of engine power and the appearance of oil on the windscreen. The pilot noticed that the propeller was not rotating along with visible damage to the engine cowling. The pilot initiated a forced landing to a nearby airport and landed uneventfully. Postaccident examination of the airplane revealed that the engine mount was bent, and a portion of one propeller blade had separated in flight.
Examination of the propeller revealed that it exhibited a fracture chordwise across the propeller approximately 12 inches outboard of the center of the propeller hub. The leading-edge area of the fracture exhibited an area of darker coloration and smoother surface texture along with fracture features consistent with progressive crack growth on the fracture surface in the area. The signatures were consistent with a fatigue fracture originating at the leading edge of the propeller
Probable Cause: The inflight separation of a section of a propeller blade due to a fatigue crack which resulted in a forced landing.
Accident investigation:
 |
|
Sources:
NTSB WPR20LA062
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Jun-2022 08:32 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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