ASN Wikibase Occurrence # 16604
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| Date: | Monday 8 September 1997 |
| Time: | 06:56:30 |
| Type: |  Aérospatiale AS 332L1 Super Puma |
| Owner/operator: | Helikopter Service |
| Registration: | LN-OPG |
| MSN: | 2344 |
| Year of manufacture: | 1991 |
| Fatalities: | Fatalities: 12 / Occupants: 12 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | 100 nm WNW of Brønnøysund -
 Norway
|
| Phase: | En route |
| Nature: | Offshore |
| Departure airport: | ENBN |
| ENNE | |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
At 0600 the helicopter departed from Brønnøysund heading for the floating production, storage and offloading (FPSO) vessel "Norne". On board were 10 passengers and 2 crew. It was a normal flight until an intermittent engine overspeed light was observed.
A fault had developed in the splined adaptor between the high speed bendix shaft and the right hand engine, which had caused damage to the engine overspeed protection system. The splined adaptor disintegrated, severed the high speed shaft, which lead to an overspeed of the power turbine which burst, cutting control rods and the helicopter became uncontrollable. Everybody on-board was killed on impact with the sea.
The critical sensor in the Health and Usage Monitoring System fitted to the aircraft had been unserviceable prior to the accident. The AIBN concluded it would have alerted if it had been serviceable.
The AIBN report makes 18 recommendations, including on regulation on HUMS.
Sources:
Norwegian Civil Aircraft since 1919 / K. Hagby, 1980 (ISBN 0 904597 2 7)
http://www.humsconference.com.au/Papers2003/HUMSp412.pdf
http://aerossurance.com/helicopters/as332l1-ln-opg-accident/
https://www.aibn.no/Aviation/Reports/2001-47-eng
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Mar-2008 13:00 | ASN archive | Added |
| 16-Dec-2009 02:02 | Anon. | Updated |
| 12-Feb-2010 00:39 | TB | Updated [Aircraft type, Source, Narrative] |
| 13-Jun-2010 13:17 | TB | Updated [Aircraft type, Location, Narrative] |
| 10-Sep-2014 07:33 | Aerossurance | Updated [Nature, Source, Narrative] |
| 10-Sep-2014 07:34 | Aerossurance | Updated [Source] |
| 08-Feb-2016 17:26 | Aerossurance | Updated [Narrative] |
| 07-Sep-2017 19:25 | Aerossurance | Updated [Source] |
| 24-Jul-2020 15:38 | Aerossurance | Updated [Nature] |
Corrections or additions? ... Edit this accident description
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