Pilot Debrief

MCDONNELL DOUGLAS HELICOPTER 369E near Northport, AL — 2014-08-19

Final reportERA14FA396
Sign in to save
Date
2014-08-19
Location
Northport, AL, USA
Aircraft
MCDONNELL DOUGLAS HELICOPTER 369E
Registration
N444RS
Category
Helicopter
Highest injury
Fatal
Fatalities
2
Phase of flight
Maneuvering

Probable cause

An inadvertent collision with a utility wire for reasons that could not be determined from recorded data and examination of the helicopter and accident site.

NTSB narrative

The pilot and passenger were inspecting a span of high-tension powerlines for damage after a recent storm. Recorded data showed that the helicopter departed and proceeded along the left side of the span at an altitude roughly consistent with the height of the suspended wires. The helicopter's last recorded position was about 400 ft laterally and about 25 ft below the point where it ultimately contacted and severed the uppermost wire of the span, which was about 150 ft above ground level. The severed wire was located on the right side of the span, whereas the helicopter was flying on the left. The helicopter's ground track transitioned from left to right and back across the span near transmission towers earlier during the flight; however, there were no transmission towers located in the immediate vicinity of the accident site. Portions of the wreckage came to rest directly below the severed wire, and oriented along a debris path to the right of and along the helicopter's previous direction of travel. Examination of the wreckage revealed no evidence of any mechanical malfunctions or failures before the helicopter contacted the wire.

Analysis

Primary failure mode
Loss of control
First missed decision gate
Pilot could have avoided flying near powerlines during inspection.

NTSB coding

Evidence available

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

Docket documents13

Related mishaps