NTSB Identification: WPR11CA360
14 CFR Part 91: General Aviation
Accident occurred Wednesday, August 10, 2011 in New Washoe City, NV
Probable Cause Approval Date: 10/17/2011
Aircraft: Aircraft Mfg & Design LLC CH750 STOL, registration: N799US
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 under instruction (PUI) and certified flight instructor (CFI) were practicing slow flight at approximately 200 feet above ground level when the CFI noticed that the airplane was sinking and the airspeed was low. He instructed the PUI to add power in order to maintain altitude; the PUI did, but the airplane continued to sink. The CFI then added more power and pitched the nose up in an attempt to gain altitude and arrest the sink, but in response, the PUI pushed the nose down and the airplane made an inadvertent landing, bouncing twice and coming to rest inverted. The airplane's firewall and vertical stabilizer were substantially damaged. The CFI reported no preimpact mechanical malfunctions or failures that would have precluded normal operations.

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

The pilot under instruction's control interference and the CFI's inadequate supervision of the flight.

Full narrative available

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