# NTSB FTW84LA391: Bell 206B III, N22713, Ship Shoal 241, September 13, 1984

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: September 13, 1984, 15:20 local (20:20 UTC)
- Place: Ship Shoal 241
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21464
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW84LA391
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21464/pdf
- Page: https://openairdocs.org/ntsb/FTW84LA391

## Sequence of events

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

- In flight collision with object, hover
  - object - airport facility (cause)
  - directional control - not maintained, pilot in command (cause)
- Loss of control - in flight, hover
- Roll over, descent - uncontrolled

## Analysis

THE PILOT HAD LANDED ON A OFFSHORE HELIDECK, WHICH HAD ONE AIRCRAFT PARKED ON IT. AFTER THE PASSENGERS WERE CLEAR OF THE AIRCRAFT, THE PILOT PICKED THE AIRCRAFT UP TO A HOVER. DURING THE HOVER, THE PILOT ALLOWED THE AIRCRAFT TO DRIFT SLIGHTLY AND ONE SKID STRUCK A HATCH COVER THAT PROTRUDED 8.5' ABOVE THE HELIDECK, ABOUT 3.5' INBOARD OF THE EDGE.AS THE SKID HIT THE HATCH COVER, THE AIRCRAFT PIVOTED AROUND THE CONTACT POINT AND ENTERED DYNAMIC ROLLOVER. THE AIRCRAFT SUBSEQUENTLY ROLLED OFF THE DECK AND CRASHED ONTO A LOWER LEVEL OF THE OIL RIG.

## Aircraft

- Registration: N22713 (not matched to a registry record)
- Reported make and model: BELL 206B III
- Category: Helicopter
- Serial number: 3617
- Airframe hours: 3621
- Engines: ALLISON 250C20B 317 horsepower turbo shaft
- Damage: Destroyed
- Flight: Positioning, Part 91
- Registered owner: Petroleum Helicopters, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, August 27, 1984, 27 hours before
- Departed: SHIP SHOAL 241, GM
- Destination: EI25, EUGENE ISLAND, GM
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; instrument ratings: helicopter; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 4,153 total, 2,270 in this make and model, 3,799 as pilot in command, 182 in the last 90 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 350° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 75 °F
- Altimeter: 30.00 inHg
- Observed at: S154, 10 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 19840913050949A](https://openairdocs.org/incident/19840913050949A), Sep 13, 1984: Bell 206B, Ship Shoal 241, LA, Destroyed. During hover off helideck aircraft was allowed to drift and skid struck a hatch cover. Rolled to lower level of rig

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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