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Accident: Airbus Helicopters AS350-B3

Mar 28, 2021 · Palmer, AK

NTSB numberWPR21FA143Event id20210328102813

5
Fatalities
1
Serious injuries
0
Minor injuries
0
Uninjured

Probable cause

The pilot’s failure to adequately respond to an encounter with whiteout conditions, which resulted in the helicopter’s collision with terrain. Contributing to the accident was the (1) operator’s inadequate pilot training program and pilot competency checks, which failed to evaluate pilot skill during an encounter with inadvertent instrument meteorological conditions, and (2) the Federal Aviation Administration principal operations inspector’s insufficient oversight of the operator, including their approval of the operator’s pilot training program without ensuring that it met requirements. Contributing to the severity of the surviving passenger’s injuries was the delayed notification of search and rescue organizations.

NTSB docket WPR21FA143

Source: National Transportation Safety Board. Record last changed Oct 28, 2026, 10:54 UTC.

Aircraft involved

Aircraft
Airbus Helicopters AS350-B3
Registration
N351SH
Year built
2008
Category
Helicopter
Damage
Substantial
Operating rules
Part 135: commuter and on-demand
Defining event
Landing Loss of visual reference

Source: National Transportation Safety Board aviation accident database. Counts only; Voydar holds no names.

This page restates the NTSB's public record. Injury figures are counts; Voydar does not hold or publish the names of anyone involved.