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Audit of maintenance management in Mærsk Contractors Norge AS

During the period 21-23 April 2008, the Petroleum Safety Authority Norway (PSA) conducted an audit of maintenance management in Mærsk Contractors Norge AS (MCN), including the use of empirical economic data in this context. MCN does not fulfil all regulatory requirements for maintenance management.


Background for the audit
The PSA is to set standards and follow up to ensure that the players in the petroleum activities maintain high standards in health, safety and environment, and thereby contribute to creating the greatest possible values for the society.

This follow-up shall be system-oriented and risk-based, and it shall come in addition to the industry's own follow-up.

Storting White Paper No. 7 (2001-2002) on health, safety and environment in the petroleum activities, Chapter 4.12.2, states e.g. the following regarding managing maintenance:

”The authorities believe it is necessary to further develop management models for operations and maintenance in cooperation with the industry, to ensure a joint commitment towards strengthening the quality of maintenance in the petroleum activities, in part through further development of methods and technologies, enhancing expertise and research.”

Chapter 5.4 of Storting White Paper No. 12 (2005-2006) on health, safety and environment in the petroleum activities points out that deficient maintenance can increase the risk of major accidents, injuries and incidents, and the White Paper refers to a relatively large incidence of nonconformities from the regulations.  These nonconformities include deficiencies associated with prioritization of maintenance, assessment of critical factors, follow-up of temporary equipment, unsatisfactory documentation and outstanding maintenance of safety-critical equipment.  In some cases, there was also inadequate maintenance management competence.

The relevant maintenance management requirements are particularly evident in the Activities Regulations and the Management Regulations.

Purpose of the audit
The purpose of the audit was to

  • investigate whether MCN carries out classification of equipment in accordance with applicable regulations and recognized norms, cf. Chapter IX of the Activities Regulations relating to maintenance,
  • evaluate MCN's use of this classification in maintenance management,
  • investigate the degree to which empirical economic data/quality costs associated with deficient maintenance are recorded and used to improve maintenance management.

Result of the audit
The results are based on the presentation of elements of MCN's management systems and conversations with selected personnel, primarily process owners of the maintenance, with subsequent verification of governing documents and systems for carrying out maintenance on MCN's facilities in Norway.

MCN does not fulfil all of the requirements in the regulations as regards maintenance management.

Some of our observations are characterized as nonconformities, cf. the categorization in Chapter 5.  They are grouped under the following main areas:

  • classification of systems and equipment,
  • documentation and communication of the classification made,
  • use of classification as a basis for selecting and prioritizing maintenance,
  • handling and documentation of nonconformities,
  • maintenance efficiency,
  • management of outstanding maintenance, with possible consequences for managing daily operations.

We also observed some improvement items.