# NTSB ANC90LA119: Bell 206B, N4796B, Goodnews Bay, AK, July 18, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 18, 1990, 11:40 local (19:40 UTC)
- Place: Goodnews Bay, AK
- Coordinates: 59.13092, -161.569122 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=59.1309&lon=-161.5691&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 28, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5405
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA119
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5405/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA119

## Probable cause

THE PILOT SELECTED UNSUITABLE TERRAIN. THE WET & SOFT TUNDRA WAS A FACTOR.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Roll over, takeoff - initial climb
  - terrain condition - tundra (contributing factor)
  - terrain condition - wet (contributing factor)
  - terrain condition - soft (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)

## Analysis

WHILE AT GROUND IDLE AFTER DROPPING OFF A SURVEY CREW, THE PILOT OBSERVED THAT THE RIGHT SKID HAD SUNK INTO THE SOFT TUNDRA. WHILE ATTEMPTING TO FREE THE SKID AT FULL RPM THE HELICOPTER ROLLED RIGHT 90 DEG AND THE MAIN ROTOR STRUCK THE GROUND.

## Aircraft

- Registration: N4796B (not matched to a registry record)
- Reported make and model: BELL 206B
- Category: Helicopter
- Serial number: 329
- Airframe hours: 7869
- Engines: ALLISON C20-B 400 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Alaska Helicopter, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 23, 1990, 97 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; airline transport; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 6,284 total, 1,609 in this make and model, 5,361 as pilot in command, 126 in the last 90 days, 58 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 15 knots, gusting 20
- Visibility: 40 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point -0 °F
- Altimeter: 30.00 inHg

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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