Report on incident approx. 120 NM southwest of Sola, Norway 4 October 2013, with Sikorsky S-92A, LN-ONW, operated by Bristow Norway AS

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Beskrivelse

En route from Valhall to Sola several cautions regarding the main gear box oil system gave cause for concern. The crew considered that it was too risky to continue toward land, and chose to make an emergency landing at the decommissioned oil rig Yme. The possibility that there could be a critical failure in the main gear box, also made the crew consider a possible emergency landing at sea before the helicopter reached Yme.

There was no damages during the emergency landing. The crew and passengers were later picked up by a rescue helicopter and flown ashore. The investigation has shown that a minor technical error had triggered a number of misleading cautions. The current emergency checklist was incomplete and did not provide adequate support for decision making.

After the incident, the manufacturer revised the emergency checklist. The AIBN is however of the opinion that further improvements is needed, and has issued a safety recommendation in this regard.

Sikkerhetstilråding

Sikkerhetstilråding SL nr. 2015/11T

4. oktober 2013 nødlandet LN-ONW på den evakuerte oljeriggen Yme. En liten teknisk feil i hovedgearboksen ga indikasjoner som besetningen oppfattet som alvorlige. Havarikommisjonen mener nødsjekklisten for hovedgearboksen på S-92A var komplisert og vanskelig å forstå, særlig i en presset nødsituasjon. Dette synet støttes av operatørselskapet Bristow Norway AS. Sikorsky har i ettertid forbedret nødsjekklisten på det aktuelle punktet og har satt i gang arbeid med å forbedre indikasjonssystemet til hovedgearboksen. Statens havarikommisjon for transport mener imidlertid at det trengs ytterligere forbedringer og tilrår at Sikorsky reviderer nødsjekklisten med sikte på fortsatt forenkling og økt brukervennlighet.

Sted
120 NM southwest of Sola, Norway
Hendelsesdato
04.10.2013
Luftfartøy
Sikorsky øvrige
Operatør
Bristow Norway AS
Reg. merke
LN-ONW
Flygeforhold
VMC
Fylke
Rogaland
Type hendelse
Luftfartshendelse
Type flyging
Kontinentalsokkel
Kategori luftfart
Tung, helikopter (> 2 250kg)
Flykategori
Helikopter, Multi-engine, Turboprop/turboshaft
FIR/AOR
ENSV (Stavanger ATCC)
image
Report on incident approx. 120 NM southwest of Sola, Norway 4 October 2013, with Sikorsky S-92A, LN-ONW, operated by Bristow Norway AS Last ned rapport
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