# NTSB ATL86FA084: Bell B-214-B-1, N114RM, Bullard, GA, March 3, 1986

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Field investigation · Final report
- Date: March 3, 1986, 10:22 local (15:22 UTC)
- Place: Bullard, GA
- Location: 32.6304° N, 83.4971° W: Placed by OpenAirDocs: center of Bullard, GA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.6304&lon=-83.4971&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 6929
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL86FA084
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/6929/pdf
- Page: https://openairdocs.org/ntsb/ATL86FA084

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, hover
  - turboshaft engine,gas generator turbine - separation (cause)
  - maintenance,installation - improper, other person (cause)
  - turboshaft engine,gas generator turbine - failure,total (cause)
- Forced landing, descent - emergency
  - autorotation - performed, pilot in command
- Hard landing, landing - flare/touchdown
  - terrain condition - none suitable

## Analysis

A HELICOPTER INVOLVED IN A LOGGING OPERATION WAS IN PROCESS OF LIFTING A LOG WHEN CREW REPORTED A 'LOUD EXPLOSION' AND A LOSS OF POWER WAS EXPERIENCED. AN AUTOROTATIVE LANDING WAS ACCOMPLISHED AND A SMALL ENGINE FIRE WAS EXTINGUISHED. THE 1ST STAGE TURBINE DISC HAD SEPARATED AND WAS UNCONTAINED. DEBRIS HAD DAMAGED THE MAIN ROTOR BLADES AND COWLING DURING ITS DEPARTURE FROM THE HELICOPTER. EVIDENCE OF A THREAD LURE WAS REPORTED ON THE MALE AND FEMALE THREADS FOR THE DISC BOLTS. THIS IS THE SECOND REPORTED IGT TURBINE DISC FAILURE ON THIS ENGINE, BOTH WERE BEING OPERATED BY THIS COMPANY AT THE TIME.

## Aircraft

- Registration: [N114RM](https://openairdocs.org/deregistered/N114RM-1996-10-22), registration cancelled 1996-10-22, S/N 28021 (OpenAirDocs)
- Reported make and model: BELL B-214-B-1
- Registry model: [Bell 214B-1](https://openairdocs.org/model/bell-214b-1) (registry code 1182105) (OpenAirDocs)
- Category: Helicopter
- Serial number: 28021
- Airframe hours: 6709
- Engines: LYCOMING T5508D 2250 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Other work use, Part 133
- Operator: Rocky Mountain Helicopters,Inc
- Airworthiness certificate: Standard, Transport
- Last inspection: AAIP, February 27, 1986, 12 hours before
- Departed: BULLARD, GA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: single-engine land; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 13,656 total, 2,100 in this make and model, 13,402 as pilot in command, 240 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 280° at 11 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 63 °F, dew point 48 °F
- Altimeter: 29.00 inHg
- Observed at: WRB, 5 nm away

## 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 19860303005199A](https://openairdocs.org/incident/19860303005199A), Mar 3, 1986: Bell 214B1, Bullard, GA, Substantial damage. Forced landing,fire after engine failure. Unauthorized use of lubricant on first stage turbine bolts. Disc failed.

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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