# NTSB SEA88LA014: Bell 47G2, N6141, Lebanon, OR, October 26, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 26, 1987, 13:30 local (21:30 UTC)
- Place: Lebanon, OR
- Coordinates: 44.519325, -122.810585 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.5193&lon=-122.8106&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report December 27, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 40756
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA88LA014
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40756/pdf
- Page: https://openairdocs.org/ntsb/SEA88LA014

## Sequence of events

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

- Loss of control - in flight, descent
  - autorotation - attempted, dual student (cause)
  - remedial action - delayed, pilot in command(cfi) (cause)
  - altitude - misjudged, dual student (cause)
- In flight collision with terrain/water, descent
- Roll over, landing - flare/touchdown

## Analysis

THE STUDENT WAS PERFORMING AN AUTOROTATION AT ABOUT 50' AGL AND THE FLARE WAS BEGUN. THE INSTRUCTOR PILOT NOTICED THAT THE HELICOPTER WAS NOT LEVELING AND TOOK CONTROL OF THE AIRCRAFT. THE HELICOPTER SETTLED TAIL LOW ONTO THE SOFT GROUND STRIKING THE TAIL ROTOR, SEPARATING IT FROM THE HELICOPTER. THE HELICOPTER MADE A TURN AND THEN SETTLED TO THE GROUND WHERE IT ROLLED OVER ON ITS RIGHT SIDE.

## Aircraft

- Registration: [N6141](https://openairdocs.org/aircraft/N6141), registered now, S/N 1506 (OpenAirDocs)
- Reported make and model: BELL 47G2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1506
- Airframe hours: 8249
- Engines: LYCOMING VO-540 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Pilot Personnel
- Registered owner: Pilot Personnel International
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, February 6, 1987, 89 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 2,487 total, 665 in this make and model, 2,337 as pilot in command, 176 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 55 °F
- Altimeter: 29.00 inHg

## 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 19871026060769A](https://openairdocs.org/incident/19871026060769A), Oct 26, 1987: Bell 47G2, Lebanon, OR, Substantial damage. Student flared late and tail rotor was knocked off by ground impact followed by a spin and crash. CFI misjudgement.

## Other investigations on N6141 (3)

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 SEA70FWD13](https://openairdocs.org/ntsb/SEA70FWD13), May 9, 1970: Bell 47-G2 (N6141), Maple Valley, WA, substantial damage
- [NTSB UNK68X0141](https://openairdocs.org/ntsb/UNK68X0141), May 24, 1968: Bell 47G-2 (N6141), Alberta, Canada, destroyed
- [NTSB ANC67A0012](https://openairdocs.org/ntsb/ANC67A0012), Jul 21, 1966: Bell 47G-2 (N6141), Copper Cntr, AK, substantial damage

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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