ASN Wikibase Occurrence # 70898
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| Date: | Wednesday 2 May 1984 |
| Time: | 12:40 LT |
| Type: |  Boeing Vertol BV234LR Chinook (CH-47) |
| Owner/operator: | British Airways Helicopters |
| Registration: | G-BISO |
| MSN: | MJ-002 |
| Fatalities: | Fatalities: 0 / Occupants: 47 |
| Aircraft damage: | Substantial |
| Location: | North Sea, 8 miles WNW of Cormorant Alpha Platform -
 United Kingdom
|
| Phase: | En route |
| Nature: | Offshore |
| Departure airport: | Magnus oil field/Polycastle rig, North Sea |
| Aberdeen Airport (ABZ/EGPD) | |
| Investigating agency: | AIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Ditched 2/5/1984 in the East Shetland Basin of the North Sea, 8 miles WNW of Cormorant Alpha Platform. Lack of flotation bag integrity led the helicopter to capsize and submerge after 85 minutes. All 47 persons on board (44 passengers and 3 crew) escaped through the starboard rear hatchway, and were rescued by rescue boats and helicopters
The aircraft was not damaged by the emergency landing but sustained some damage during recovery and severe damage from the effects of saltwater immersion.
The accident was caused by two separate flying control system malfunctions that produced intermittent loss of collective control. Although the registration G-BISO was cancelled by the CAA as aircraft "destroyed" on 20/11/1984, the airframe was rebuilt as N235CH for Columbia Helicopters International. (First registered as such 23/11/1985)
Accident investigation:
 |
|
Sources:
1. AAIB: https://www.gov.uk/aaib-reports/5-1987-boeing-vertol-bv-234-lr-g-biso-2-may-1984
2. CAA: https://cwsprduksumbraco.blob.core.windows.net/g-info/HistoricalLedger/G-BISO.pdf
3. https://en.wikipedia.org/wiki/British_Airways_Helicopters#Accidents_and_incidents
4. https://www.key.aero/forum/historic-aviation/87795-spectacular-mystery-accident-nobody-hurt-who-s-got-the-details [photos]
5. https://www.helis.com/database/cn/1419/
6. https://en.wikipedia.org/wiki/Cormorant_oilfield
7. https://www.thenorthernecho.co.uk/news/1095132.100-killed-oil-rig-copter-accidents-since-1969/
8. https://www.helis.com/database/gps/cormorant_a_platform_uk
Media:
I'm a bit puzzled by your statistics, in view of the disastrous G-BWFC accident at Sumburgh, in addition to G-BISO which I think you are probably referring to. With regard to the former, this may interest. Brilliantly written, if grim reading: https://t.co/Rkr98ZtFqt
— DaddyPeb (@StrutThePeb) December 21, 2020
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Jan-2010 08:34 | TB | Added |
| 03-Jan-2010 02:51 | TB | Updated [Damage] |
| 05-Apr-2010 05:38 | TB | Updated [Aircraft type, Narrative] |
| 19-Nov-2012 16:18 | Dr. John Smith | Updated [Destination airport, Source, Embed code, Narrative] |
| 23-Dec-2012 09:17 | TB | Updated [Source, Narrative] |
| 03-Nov-2015 22:44 | Dr.John Smith | Updated [Time, Cn, Operator, Location, Source, Embed code, Narrative] |
| 03-Nov-2015 22:46 | Dr.John Smith | Updated [Departure airport] |
| 03-Nov-2015 22:49 | Dr.John Smith | Updated [Narrative] |
| 03-Nov-2015 22:53 | Dr.John Smith | Updated [Embed code] |
| 21-Jan-2016 20:46 | Aerossurance | Updated [Time, Aircraft type, Location, Source] |
| 24-Sep-2016 14:45 | Aerossurance | Updated [Narrative] |
| 01-Mar-2017 16:08 | TB | Updated [Time, Location, Source] |
| 17-Aug-2022 21:59 | Dr. John Smith | Updated [Location, Departure airport, Destination airport, Source, Embed code, Category] |
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