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ASN Wikibase Occurrence # 66102
Last updated: 18 November 2021
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Type:Silhouette image of generic SS2T model; specific model in this crash may look slightly different
Ayres S-2R-G6 Turbo Thrush
Owner/operator:Air Advantage Inc
Registration: N60015
MSN: G6-110
Fatalities:Fatalities: 0 / Occupants: 1
Aircraft damage: Substantial
Location:Ainsworth, Iowa -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Departure airport:Washington, IA (AWG)
Destination airport:Ainsworth, IA
Investigating agency: NTSB
The airplane experienced a loss of engine power while maneuvering at a low altitude during an aerial application flight. The pilot was unable to regain engine power after he turned the boost pump on and moved the throttle control to the full forward position. He then performed a forced landing on terraced terrain. A postaccident engine examination revealed evidence of continued rotation when the airplane impacted the ground. Examination of the fuel control unit (FCU) revealed that the bellows spring was fractured and the overspeed governor ball head bearing retainer was fragmented. Pieces of the fragmented retainer were found within the flow divider and fuel manifold. An unidentified contaminant was observed on the bearing race shoulder which misaligned the ball head bearing. The FCU was reportedly overhauled in 2003, but there were no component or aircraft records indicating the FCU's maintenance and installation since its manufacture. A search of the Federal Aviation Administration's service difficulty database did not specifically cite failures of the ball head bearing retainer, and the failures that were listed did not indicate the nature of those failures. The FCU manufacturer reported having no record of failures of the ball head bearing retainer; however, the repair facility that overhauled the FCU reported they had seen failures of the ball head bearing retainer.
Probable Cause: A component failure of the fuel control unit, which resulted in a loss of engine power.



Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 2 years and 2 months
Download report: Final report

Revision history:

02-Jul-2009 07:03 slowkid Added
21-Dec-2016 19:25 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
02-Dec-2017 15:46 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

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