From 31 December 2015 to 1 April 2016, the PSA carried out an investigation of the accident on COSLInnovator on 30 December 2015.
The investigation identified two breaches of the regulations:
Based on the findings made during the investigation, the PSA issued COSL Drilling Europe AS with a notification of order. In conformity with the notification, COSL Drilling Europe has now been issued with the following order:
Pursuant to the Framework Regulations, section 69 concerning administrative decisions, with reference to the Management Regulations, section 11 concerning
the basis for making decisions and decision criteria and the Framework Regulations, section 19 concerning verifications, we order COSL Drilling Europe AS, through appropriate calculations or model tests, to verify that the COSLInnovator, COSLPromoter and COSLPioneer facilities, following modifications implemented after the incident, comply with the Framework Regulations, section 3, with reference to the Norwegian Maritime Directorate's regulations on the construction of mobile offshore units (FOR 87/856), section 10, item 1.1.3, with reference to chapter 9.1 of the report. COSL Drilling Europe AS is further ordered to have these calculations or model tests verified by an independent, competent third-party.
The order shall have been complied with by 1 October 2016. We are to be notified when the order has been carried out. A plan for the work is to be submitted to the PSA by 15 June 2016.
The PSA takes a positive view of the fact that COSL has already initiated the work that the order covers.
Learning in an industry perspective
Since the accident, the PSA has been working to identify lessons to be learned from the incident and communicate them to the industry as a whole. The PSA expects all participants to acquaint themselves with the background to the accident and ensure that the lessons learned from the investigation report are absorbed into their own companies. This means that each individual company must ensure that the requirements concerning air gaps and horizontal waves forces are catered for on their own facilities. This is the companies' own responsibility.
The PSA is continuing to work on factors of potential significance for the industry as a whole. This work is being performed in dialogue with the Norwegian Maritime Directorate, DNV GL, design companies, owners and operators.
In conjunction with the Norwegian Maritime Directorate, the PSA is also assessing any need for adjustments to the regulations and calculation practice in respect of the problems that the accident has brought to light.
The PSA will also assess factors relating to air gaps and horizontal wave forces in future AoC processing.
Øyvind Midttun, Press contact
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