# NTSB FTW84LA270: Bell 206B, N2276Q, South Pelto, June 8, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: June 8, 1984, 13:00 local (18:00 UTC)
- Place: South Pelto
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 4 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21366
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW84LA270
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21366/pdf
- Page: https://openairdocs.org/ntsb/FTW84LA270

## 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, cruise - normal
  - compressor assembly,blade - failure,total (cause)
- Forced landing, descent - emergency
  - autorotation - performed, pilot in command
- Ditching, landing - flare/touchdown
  - terrain condition - water,rough (contributing factor)
  - landing gear,float assembly - overload
- Roll over, landing - flare/touchdown

## Analysis

WHILE CRUISING AT 550 FT ABOVE THE GULF OF MEXICO, THE PLT NOTED HI TOT INDICATIONS, FOLLOWED BY LOSS OF N1 RPM & ENG FAILURE. AN AUTOROTATION WAS INITIATED WHICH TERMINATED IN A HARD LANDING IN 5 FT WAVES. ONE EMERGENCY FLOAT SEPARATED DURING THE LANDING & THE HELICOPTER ROLLED OVER, BUT CONTINUED TO FLOAT. A TEARDOWN OF THE ENG REVEALED THAT A 2ND STAGE COMPRESSOR WHEEL BLADE, P/N 6890502, HAD FAILED. THIS RESULTED IN SEVERE DAMAGE TO THE 2ND & 4TH STAGE AREAS OF THE ENG.

## Aircraft

- Registration: [N2276Q](https://openairdocs.org/deregistered/N2276Q-2013-03-26), registration cancelled 2013-03-26, S/N 3629, built 1982 (OpenAirDocs)
- Reported make and model: BELL 206B
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (registry code 1181511) (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: 3629
- Airframe hours: 3460
- Engines: ALLISON 250-C20B 420 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Petroleum Helicopters Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, May 30, 1984, 58 hours before
- Departed: S TIMBALIER BLK, GM
- Destination: DULAC, LA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; commercial; instrument ratings: helicopter; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 1,167 total, 252 in this make and model, 647 as pilot in command, 97 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 10 knots
- Visibility: 5 statute miles
- Lowest ceiling: 1,200 ft broken
- Temperature: 82 °F, dew point 72 °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 19840608070269A](https://openairdocs.org/incident/19840608070269A), Jun 8, 1984: Bell 206B, South Pelto Nr5, LA, Substantial damage. Crash occurred during auto rotation landing in gulf after second stage compressor blade 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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