Amateur-built ZENITH CH 701 N44CP accident near Jackson, Wyoming

Probable cause

A total loss of engine power for undetermined reasons, and the pilot’s failure to maintain proper control of the airplane, which led to a hard, bounced landing.

NTSB analysis

The pilot reported that had just finished rebuilding the airplane and was conducting a local, personal flight, which was the airplane’s first flight since an accident 5 years earlier. While returning to land on a grass strip and shortly after switching from the right to the left tank, the engine began to run roughly and “sputter.” The pilot added that the airplane was “high and fast” on the approach but that he chose to continue the landing due to the engine problem. Upon landing, the airplane bounced, the nosewheel hit the ground hard and collapsed, and the airplane then nosed over and came to rest inverted.

Postaccident engine examination revealed no evidence off mechanical malfunctions or failures that would have precluded normal operation. The pilot reported that the airplane had an adequate amount of fuel onboard when the engine lost power. He added that the quick fuel disconnect on the left wing fuel tank was loose before the flight, so he reconnected the fitting and speculated that air might have entered the lines when he reconnected the fitting and led to the engine sputtering when he switched tanks. The reason for the loss of engine power could not be determined based on the available information.

Text from the NTSB. Open the NTSB docket for CEN18LA178 for the full record.