Amateur-built KITFOX SPEEDSTER N89MM accident near Elephant Butte, New Mexico

Probable cause

The pilot's loss of control of the airplane for reasons that could not be determined because postaccident examination of the airplane did not reveal any anomalies that would have precluded normal operation.

NTSB analysis

The airplane was on a local flight from a nearby airport. Two witnesses, who were driving north on an interstate highway, said the airplane was flying south about 1,000 feet above the ground when it pitched upward, rolled to the right, and then spiraled toward the ground. The witnesses said that they did not see any fire or smoke before they lost sight of the airplane. However, they subsequently saw a plume of smoke rising from behind a hill. A postaccident examination of the airplane wreckage showed that the airplane impacted the terrain in a right bank, slightly nose low attitude, then spun around to the left. A postimpact fire consumed most of the airplane structure. An examination of the wreckage did not reveal any preimpact anomalies that would have precluded normal operation of the airplane. A rod end for a push-pull tube between the flap handle and the flaperon mixer unit was found failed in overload at the outer two threads. Although this finding indicates potential problems with the construction and/or maintenance of the airplane, there is no indication that it contributed to the accident. Forensic toxicology testing of the pilot’s liver and kidney detected Diphenhyramine; however, the level of Diphenhydramine was not substantive enough to be determined and its presence most likely did not induce impairment.

Text from the NTSB. Open the NTSB docket for CEN11FA312 for the full record.