ASN Wikibase Occurrence # 278906
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| Date: | Saturday 14 September 2019 |
| Time: | 11:25 LT |
| Type: | Smyth Sidewinder |
| Owner/operator: | private |
| Registration: | N492AC |
| MSN: | 002 |
| Year of manufacture: | 2003 |
| Total airframe hrs: | 60 hours |
| Engine model: | Lycoming O-320-E2A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Tucumcari, New Mexico -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Gallup, NM |
| Tucson International Airport, AZ (TUS/KTUS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that during cruise flight, the engine momentarily started to run rough before he heard a loud bang followed by a separation of a portion of the propeller blade. The pilot shut the engine down and performed a forced landing to open desert terrain, during which the airplane impacted vegetation, resulting in substantial damage to the left wing.
Postaccident examination of the propeller blade revealed a chordwise fracture across the propeller about 12 inches from the hub. The fracture origin area exhibited a small pit, consistent with progressive crack growth from a flat fracture surface in the area identified as the origin. The pit was likely initiated by corrosion, as it exhibited evidence of chlorine-containing salts. No maintenance logbooks were located for the propeller, and its total time in service and most recent inspection were not determined.
Probable Cause: The in-flight separation of a section of a propeller blade due to a fatigue crack, which resulted in a forced landing.
Accident investigation:
 |
|
Sources:
NTSB WPR19LA273
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Jun-2022 11:48 | ASN Update Bot | Added |
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