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ASN Wikibase Occurrence # 183098
Last updated: 5 December 2021
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Type:Silhouette image of generic VELO model; specific model in this crash may look slightly different
Velocity STD RG
Registration: N133SV
MSN: SFE-012
Fatalities:Fatalities: 0 / Occupants: 1
Aircraft damage: Substantial
Location:Kern County, Rosamond, CA -   United States of America
Phase: Landing
Departure airport:Rosamond, CA (L00)
Destination airport:Rosamond, CA (L00)
Investigating agency: NTSB
Shortly after departure on the local flight, the private pilot observed that the engine temperature was higher than it had been on the previous day's flight. After reducing power, the engine began to surge, which prompted the pilot to return to the airport. Unable to maintain altitude, the pilot elected to land in a vacant field. The left wing sustained substantial damage during the landing. A postaccident examination of the engine revealed that the No. 1 connecting rod assembly had failed. Although the reason for the failure could not be determined, the fracture surfaces exhibited signatures of fatigue consistent with a malfunction of the connecting rod bearing, such as improper bearing size, rotation of the bearing during service, or operation of a severely worn bearing. Such conditions would result in higher-than-normal operating stress, and likely contributed to the propogation of the fatigue cracking.
Probable Cause: A partial loss of engine power due to failure of the No. 1 connecting rod as a result of multiple fatigue cracks for reasons that could not be determined during on postaccident examination.


FAA register:

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Download report: Final report

Revision history:

05-Jan-2016 02:27 Geno Added
21-Dec-2016 19:30 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
19-Aug-2017 13:54 ASN Update Bot Updated [Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative]

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