NTSB Identification: WPR14CA166
14 CFR Part 91: General Aviation
Accident occurred Saturday, April 12, 2014 in Kent, OR
Probable Cause Approval Date: 06/18/2014
Aircraft: PIPER PA 18-135, registration: N1394Y
Injuries: 1 Serious.
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 of the tailwheel-equipped airplane had spent the morning practicing hilltop landings with a second airplane, as a flight of two. The hilltop where the accident occurred was the third landing location. The landing was uphill and uneventful, and after coming to a stop he parked the airplane, exited, and went for a hike. After returning, the first airplane departed downhill successfully, with the accident airplane in trail. The pilot reported that once airborne, the airplane drifted left, and did not respond fully to his control inputs. He further stated that a slight upslope air movement was present, and that the slipstream from the propeller of the leading airplane may have contributed to the loss of control. The left wingtip struck a tree and the airplane tumbled. The pilot reported no mechanical malfunctions or failures with the airplane that would have precluded normal operation. The airplane sustained substantial damage to both wings and the forward cabin during the accident sequence.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot's failure to maintain aircraft control during takeoff. Full narrative available
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