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| Date: | Thursday 10 November 1988 |
| Time: | 08:50 |
| Type: |  Sikorsky S-61N-II |
| Owner/operator: | British International Helicopters |
| Registration: | G-BDES |
| MSN: | 61747 |
| Fatalities: | Fatalities: 0 / Occupants: 13 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | North Sea, 90 nm NE of Aberdeen -
 United Kingdom
|
| Phase: | En route |
| Nature: | Offshore |
| Departure airport: | Sedco 703 oil rig |
| Aberdeen Airport (ABZ/EGPD) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Low gearbox oil pressure warning accompanied by vibration after fatigue failure of helical combiner gear due to aluminium oxide inclusions. Ditched, inverted and sank. 13 POB - All rescued.
Accident investigation:
 |
|
Sources:
https://www.gov.uk/aaib-reports/1-1990-sikorsky-s61n-g-bdes-10-november-1988
https://www.theguardian.com/lifeandstyle/2017/feb/24/experience-helicopter-crash-north-sea
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 31-Dec-2009 02:02 | TB | Added |
| 10-Nov-2012 17:15 | Dr. John Smith | Updated [Source, Narrative, ] |
| 11-Nov-2012 10:10 | Dr. John Smith | Updated [Time, Location, Destination airport, Source, Narrative, ] |
| 22-Dec-2012 13:58 | TB | Updated [Location, Departure airport, Destination airport, Source, Narrative, ] |
| 25-Feb-2017 11:12 | Aerossurance | Updated [Source, Narrative, ] |
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