Ayres S2R-G6 N70WY

Summary

On 11 June 2012 at about 13:20 local time, a Ayres S2R-G6 registered N70WY, operated by Sky Aviation, was involved in an accident near Riverton, Wyoming, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

11 June 2012 at 13:20

Classification

Accident

Location

Riverton, Wyoming, United States

Nearest airport

Riverton Regional (RIW)

Coordinates

43.0500, -108.4500

Aircraft

Ayres S2R-G6

Registration

N70WY

Category

Airplane

Engines

1

Operator

Sky Aviation

Operating rule

Part 137: Agricultural

Purpose of flight

Aerial Application

Phase of flight

Not recorded

Route

Riverton → Riverton

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

WPR12LA256

Nobody was injured.

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.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full 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.

Quoted verbatim from the NTSB record.