# NTSB ANC87FA043: Bell 47G-2, N6140C, Anchorage, AK, March 7, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: March 7, 1987, 15:30 local (19:30 UTC)
- Place: Anchorage, AK
- Coordinates: 61.199352, -149.749496 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1994&lon=-149.7495&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 21, 1988
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4771
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87FA043
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4771/pdf
- Page: https://openairdocs.org/ntsb/ANC87FA043

## Sequence of events

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

- Abrupt maneuver, hover
  - procedures/directives - not followed, dual student (contributing factor)
  - procedures/directives - not followed, pilot in command(cfi) (contributing factor)
  - aircraft handling - not maintained, pilot in command(cfi) (cause)
  - altitude - improper, pilot in command(cfi) (cause)
  - maneuver - improper, pilot in command(cfi) (cause)
- In flight collision with terrain/water, hover

## Analysis

A FLIGHT INSTRUCTOR AND HIS COMMERCIAL ROTORCRAFT STUDENT WERE PRACTICING QUICK STOPS TO A HOVER AT LOW ALTITUDE OVER A SNOW COVERED NON-MAINTAINED AIRSTRIP. THE STUDENT, A COMMERCIALLY RATED FIXED WING PILOT, HAD SUCCESSFULLY COMPLETED THREE QUICK STOPS, BUT STRUCK THE TAIL ROTOR ON THE RUNWAY SURFACE ON HIS FOURTH ATTEMPT CAUSING THE TAIL ROTOR TO SEPARATE FROM THE AIRCRAFT. THE FLIGHT INSTRUCTOR TOOK THE CONTROLS AND MADE AN EMERGENCY LANDING. THE HELICOPTER LANDED HARD AND ROLLED ONTO ITS RIGHT SIDE. THE HELICOPTER WAS SUBSTANTIALLY DAMAGED, BUT NEITHER PILOT WAS INJURED.

## Aircraft

- Registration: [N6140C](https://openairdocs.org/aircraft/N6140C), registered now, S/N 47, built 1948 (OpenAirDocs)
- Reported make and model: Bell 47G-2
- 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: 47
- Airframe hours: 8399
- Engines: LYCOMING VO-435-B1A 265 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Wilbur'S Flight Operations
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, May 15, 1986, 83 hours before
- Departed: MRI, ANCHORAGE, AK
- Airport: CSR, Campbell Airstrip, runway 2, 5,000 × 150 ft, snow

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; flight instructor, airline transport, commercial; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 31,000 total, 190 in this make and model, 29,000 as pilot in command, 230 in the last 90 days, 16 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 350° at 8 knots
- Visibility: 50 statute miles
- Lowest ceiling: 9,000 ft overcast
- Temperature: 16 °F, dew point 9 °F
- Altimeter: 30.00 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 19870307005419A](https://openairdocs.org/incident/19870307005419A), Mar 7, 1987: Bell 47G2, Anchorage, AK, Substantial damage. The tailrotor struck the runway during quick stop practice. Student delayed instructor actions during landing.

## Other investigations on N6140C (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 ANC83FA092](https://openairdocs.org/ntsb/ANC83FA092), Jun 7, 1983: Bell B47G-2 (N6140C), Anchorage, AK, substantial damage
- [NTSB ANC75AA029](https://openairdocs.org/ntsb/ANC75AA029), Aug 27, 1975: Bell 47G-2 (N6140C), Hurricane, AK, substantial damage
- [NTSB ANC75AAG87](https://openairdocs.org/ntsb/ANC75AAG87), May 1, 1975: Bell 47G-2 (N6140C), Anchorage, 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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