Wednesday, May 25, 2016

Aeronca 11AC Chief, N85871: Accident occurred May 19, 2016 in Vinton, Benton County, Iowa

http://registry.faa.gov/N85871

NTSB Identification: GAA16CA257
14 CFR Part 91: General Aviation
Accident occurred Thursday, May 19, 2016 in Vinton, IA
Probable Cause Approval Date: 07/25/2016
Aircraft: AERONCA 11AC, registration: N85871
Injuries: 2 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot reported that during the landing roll the airplane rolled over an uneven crest on the runway and the airplane became airborne. The pilot further reported that he encountered a crosswind gust and the left wing rose and the airplane veered to the right. Subsequently, the airplane departed the runway and ground looped.

The left wing rear spar was substantially damaged. 

An automated weather observing system at the airport, about the time of the accident, reported the wind at 120 degrees true, at 7 knots, gusting to 16 knots, for the landing on runway 16. 

The pilot did not report any mechanical malfunctions or failures with the airplane that would have precluded normal operation.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:

The pilot's failure to maintain directional control during the landing roll in gusty crosswind conditions, which resulted in a runway excursion and ground loop.

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