# NTSB SEA91FA124: Bell 206BII, N90307, Brewster, WA, May 28, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: May 28, 1991, 10:30 local (17:30 UTC)
- Place: Brewster, WA
- Coordinates: 48.149028, -119.820907 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.1490&lon=-119.8209&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 31, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41320
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91FA124
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41320/pdf
- Page: https://openairdocs.org/ntsb/SEA91FA124

## Probable cause

THE PILOT-IN-COMMAND'S SELECTION OF UNSUITABLE TERRAIN FOR THE EMERGENCY SIMULATION.

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - terrain condition - soft (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command(cfi) (cause)
  - autorotation - simulated, pilot in command(cfi)
  - run on landing - attempted, copilot/second pilot

## Analysis

THE BELL 206-BII TOUCHED DOWN DURING A SIMULATED POWER FAILURE AFTER TAKEOFF, SUSTAINING SUBSTANTIAL DAMANGE WHEN THE SKIDS DUG INTO SOFT SAND.  THE TAIL BOOM WAS WRINKLED AND ITS SKINS CRACKED. THERE WAS EVIDENCE OF A SPIKE KNOCK AND THE REAR CROSSMEMBER FOR THE SKIDS SHIFTED.

## Aircraft

- Registration: [N90307](https://openairdocs.org/aircraft/N90307), registered now, S/N 1747, built 1975 (OpenAirDocs)
- Reported make and model: BELL 206BII
- Registry model: [Bell 206B II](https://openairdocs.org/model/bell-206b-ii) (registry code 1181505) (OpenAirDocs)
- Registry engine: [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series) (registry code 03020, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1747
- Engines: ALLISON 250-C20B 317 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: D & E Storage
- Registered owner: D & E Storage
- Airport: S-97, Anderson Field

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane, helicopter; medical: class 2, valid medical--w/ waivers/lim; flight hours: 10,000 total, 600 in this make and model, 9,500 as pilot in command, 75 in the last 90 days, 25 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 3 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19910528018779A](https://openairdocs.org/incident/19910528018779A), May 28, 1991: Bell 206B1, Brewster, WA, Substantial damage. Simulated power loss. Auto rotated to run landing in soft sand. Sudden stop damaged boom. Flew helicopter to ramp.

## Other investigations on N90307 (1)

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.

- [NTSB SEA00LA197](https://openairdocs.org/ntsb/SEA00LA197), Aug 24, 2000: Bell 206BII (N90307), Newhalem, WA, substantial damage. Probable cause: Debonding between the elastomeric material and the center plate of the transmission isolation mount.

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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