Pilot Debrief

BELL 206 near Supai, AZ — 2016-04-06

Final reportGAA16CA179
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Date
2016-04-06
Location
Supai, AZ, USA
Aircraft
BELL 206
Registration
N73AW
Category
Helicopter
Highest injury
Minor
Fatalities
0
Phase of flight
Approach

Probable cause

The pilot's decision to fly a normal approach and forgetting that the long line remained attached to the helicopter, which resulted in the line snagging on a ridgeline, a loss of lateral control, and a rollover.

NTSB narrative

The pilot reported that he was performing external load long line hauling operations with a helicopter and was on a return leg with two empty nets. During the approach to a hilltop helipad, the pilot reported that he performed a normal approach, rather than a long line approach. Subsequently, the 100 foot long line snagged on a ridgeline and the helicopter jerked in an uncontrollable turn to the right, touched down right skid first, and rolled over. The pilot reported that he forgot that the long line was still attached. The tail boom was substantially damaged. The pilot did not report any mechanical malfunctions or failures with the helicopter that would have precluded normal operation. The operator submitted two operator/ owner safety recommendations to the National Transportation Safety Board investigator-in-charge. First, the operator revised the normal operation checklist. The revised checklist included a new "CARGO HOOK – CHECK" in both the BEFORE TAKEOFF and DESCENT AND LANDING checklist. Second, the chief pilot provided a copy of a memorandum to all employees that directs the use of an observer, when available, to observe the takeoff and landings and communicate any unsafe condition to the pilot via radio communication or hand signals.

Analysis

Primary failure mode
Human factors
First missed decision gate
Pilot forgot the long line was still attached during approach.

NTSB coding

Evidence available

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

Docket documents3

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