Pilot Debrief

AYRES S2R-G6 near Riverton, WY — 2012-06-11

Final reportWPR12LA256
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Date
2012-06-11
Location
Riverton, WY, USA
Airport
RIW
Aircraft
AYRES S2R-G6
Registration
N70WY
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Initial climb

Probable cause

An engine overspeed shortly after takeoff for reasons that could not be determined because postaccident examination revealed no mechanical malfunctions or failures that would have precluded normal operation.

NTSB narrative

The pilot reported that, shortly after departure, he observed the torque and temperature gauges move to extremely high values. The engine did not respond to speed or power lever inputs; however, the pilot reported that the linkage and amount of travel of the controls felt normal. The pilot diverted to a nearby airport and, when the airplane was lined up for landing on the runway, he shut down the engine. The pilot reported that, during the final descent, the airplane encountered a downdraft and collided with a light. Subsequently, the pilot was unable to maintain the airplane on an adequate descent glidepath, and it touched down in the dirt short of the runway. Postaccident examination of the engine revealed no mechanical anomalies that would have precluded normal operation. Examination of the fuel control unit revealed several anomalies within the unit; however, none of those anomalies would have resulted in the reported engine overspeed condition.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Pilot could have aborted the flight after observing engine gauge anomalies.

NTSB coding

Evidence available

  • 6 docket documents
View NTSB final reportView NTSB docket

Docket documents6

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