Pilot Debrief

COMBS EARL W KITFOX SPEEDSTER near Elephant Butte, NM — 2011-05-01

Final reportCEN11FA312
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Date
2011-05-01
Location
Elephant Butte, NM, USA
Airport
TCS
Aircraft
COMBS EARL W KITFOX SPEEDSTER
Registration
N89MM
Category
Airplane
Highest injury
Fatal
Fatalities
1

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 narrative

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.

Analysis

Primary failure mode
Human factors
First missed decision gate
Pilot's decision to fly with sedating medication in system.

NTSB coding

Evidence available

  • Photos
  • 18 docket documents
View NTSB final reportView NTSB docket

Docket documents18

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