Pilot Debrief

SCHWEIZER 269C near Gary, SD — 2013-07-23

Final reportCEN13LA431
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Date
2013-07-23
Location
Gary, SD, USA
Aircraft
SCHWEIZER 269C
Registration
N7507A
Category
Helicopter
Highest injury
Minor
Fatalities
0
Phase of flight
Descent

Probable cause

The failure of the engine connecting rod due to fatigue.

NTSB narrative

The pilot was descending the helicopter from about 1,000 feet above ground level (agl) and setting up for a landing at an off-airport location. At 300 to 500 feet agl, the pilot felt a major vibration in the helicopter. He immediately initiated an autorotation and landed the helicopter. During the forced landing, the helicopter rolled over on its right side and sustained substantial damage. Examination of the engine revealed that the No. 3 connecting rod had failed. Material examination of the connecting rod showed the rod failed due to multiple fatigue cracks.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Pilot could have conducted a precautionary landing before major vibration occurred.

NTSB coding

Evidence available

  • 6 docket documents
View NTSB final reportView NTSB docket

Docket documents6

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