NTSB Identification: LAX07CA161.
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Accident occurred Saturday, May 12, 2007 in Glendale, AZ
Probable Cause Approval Date: 07/25/2007
Aircraft: Aeronca 11AC, registration: N85835
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 airplane ground looped while on the landing roll during an instructional flight. The private pilot said that he was receiving instruction from the certificated flight instructor (CFI) because he had very little experience with conventional landing gear equipped airplanes like the accident aircraft. While on the downwind leg of the traffic pattern, the pilot saw another aircraft on a straight in approach. In order to give the other airplane enough clearance, he began a series of "S" turns, which resulted in an unstabilized approach. He noted that on short final the airplane was too high and at an airspeed twice as fast as normal. The airplane touched down and began a slow right turn. The airplane continued the turn and veered of the runway surface, colliding with a runway direction sign and taxiway light. The private pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine.

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

The private pilot's unstabilized approach and failure to maintain directional control during the landing roll, which resulted in a ground loop. Also causal was the instructor's inadequate supervision and failure to take remedial action.

Full narrative available

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