Piper PA-18A 150 Super Cub, N9295D, Sunstate Aircraft LLC: Accident occurred January 24, 2016 in Auburn, Washington

SUNSTATE AIRCRAFT LLC: http://registry.faa.gov/N9295D

FAA Flight Standards District Office:  FAA Seattle FSDO-01

NTSB Identification: GAA16CA112
14 CFR Part 91: General Aviation
Accident occurred Sunday, January 24, 2016 in Auburn, WA
Probable Cause Approval Date: 03/14/2016
Aircraft: PIPER PA 18A 150, registration: N9295D
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 flight instructor reported that during the landing roll the airplane veered left. The pilot receiving instruction applied a "sharp application" to the right brake. The flight instructor further reported that he directed the pilot receiving instruction "off the brakes", a total of three times. As a result of the right brake application, the airplane ground looped to the right, the left main landing gear collapsed, and the left wing impacted the ground, which resulted in substantial damage to the left wing.

The flight instructor reported that there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The failure of the pilot receiving instruction to maintain directional control during the landing roll, resulting in a ground-loop.