DEN90FA053

NTSB accident investigation · Bell 205A-1 · Wrangell, AK · February 7, 1990

Accident · FatalField investigationFinal report
Date
February 7, 1990, 15:13 local (19:13 UTC)
Place
Wrangell, AK
Injuries
6 fatal, 2 serious
Damage
Destroyed
Phase of flight
Enroute
Aircraft
CGNMJBell 205A-1
Weather
Instrument (IMC) · Day
Status
Completed · report June 10, 1991
Report
Approved by Office Director
Case key
17817

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's continued VFR flight into instrument meteorological conditions (IMC), and his failure to maintain control of the aircraft due to spatial disorientation. Factors related to the accident were: company induced pressure to make the flight, the pilot's decision to initiate flight into known adverse weather conditions, his lack of instrument experience, his overconfidence in his personal abilities, and the adverse weather conditions.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherCruise
Flight into known adverse weather - initiatedPilot in commandFactor
Weather condition - fogFactor
Weather condition - snowFactor
Weather condition - obscurationFactor
Weather condition - whiteoutFactor
Vfr flight into imc - continuedPilot in commandCause
Overconfidence in personal abilityPilot in commandFactor
Company-induced pressureCompany/operator managementFactor
Lack of total instrument timePilot in commandFactor
Loss of control - in flightManeuvering
Aircraft control - not maintainedPilot in commandCause
Spatial disorientationPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - water,frozen

Analysis

The helicopter, c-gnmj, crashed on a frzn river as miners were being transported from the johnny mountain gold mine (near the U.S./canadian border) to Wrangell, AK. The plt could not recall the accident & the surviving passenger (pax) refused to be interviewed. Another helicopter was en route from Wrangell to the mine site at the same time. The plt of the other helicopter made 2 attempts to penetrate the back side of the snow squall & failed. After reversing course to rtrn to Wrangell, that plt sighted the wreckage of c-gnmj. Passengers who had flown to Wrangell aboard c-gnmj on a previous trip said they had encountered snow squalls & whiteout conditions. At one point, one of the pax believed the helicopter was in a hover. He said it then came out of the squall in a steep bank. A former employee rprtd that company officials pressured the plts to complete their flts, in spite of marginal wx conditions.

Aircraft

Registration
CGNMJ
Reported as
Bell 205A-1
Category
Helicopter
Serial number
30264
Airframe hours
7,160
Engine
Lycoming T5313B, 1,250 horsepower, turbo shaft
Damage
Destroyed
Flight
Part 91
Operator
Northern Mountain Helicopters
Registered owner
Northern Mountain Helic. Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · January 11, 1990 · 91 hours before
Departed
NONE · Johnny Mountain
Destination
WRG · Wrangell, AK
Flight plan
Company VFR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
26
Certificate
Commercial
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
4,500 total · 1,100 in this make and model · 120 in the last 90 days · 30 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day
Lowest ceiling
100 ft