Amateur-built GLASAIR SUPER II RG N248ST accident near Santa Ynez, California

Probable cause

A partial loss of engine power for reasons that were not determined.

NTSB analysis

The pilot reported that his intent was to practice touch-and-go takeoffs and landings. The first takeoff and landing to a full stop was normal. The pilot reported he taxied back and initiated a full throttle takeoff. He reported that after lifting off at 70 knots, the engine continued to run but was no longer producing power, and the airplane began to descend. The pilot reduced the throttle and initiated a forced landing to a grass field. The airplane traveled through the airport perimeter fence and continued to a road where it contacted a dirt berm.

The foreign manufactured engine was an unusual design. Several unsuccessful attempts were made to contact and work with the manufacturer to determine the cause of the partial loss of engine power.

Text from the NTSB. Open the NTSB docket for WPR18LA007 for the full record.