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Step Change in Safety – Major Accident Hazard (MAH) Awareness

Step Change in Safety have published a safety moment or “mini alerts pack” on Major Accident Hazard (MAH) Awareness. It can be downloaded here.

The pack has been compiled to enable users to have proactive safety conversations about barriers to major accidents. It contains learnings from both oil & gas and other industries’ major accidents.

Each mini alert describes the circumstances, what went wrong and includes discussion points relating to the 7C’s of Safety.

The major accidents covered include:

  • Chevron Richmond Refinery hydrocarbon leak of 6/8/2012 – nineteen persons engulfed by fire;
  • Costa Concordia disaster of 13/1/2012 – ship holed, 32 fatalities;
  • DuPont Chemical Release of 23/1/2010 – one fatality;
  • Flixborough disaster of 1974 – 28 fatalities in chemical plant fire and explosion;
  • Grenfell Tower – 14/6/2017 – tower block fire leading to 72 fatalities;
  • Lindsey oil refinery – 29/10/2010 – one fatality;
  • Mumbai High  – 27/7/2005 – oil rig fire and explosion, 22 fatalities;
  • Pryor Trust well blowout – 22/1/2018, five fatalities;
  • Tenerife airport disaster of 1977 – aircraft collide leading to 583 fatalities.

IMCA works closely with Step Change in Safety to promote and encourage sharing of incidents and to reduce incident and injury rates.

Safety Event

Published: 11 August 2021
Download: IMCA SF 22/21

IMCA Safety Flashes
Submit a Report

IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of all. The effectiveness of the IMCA Safety Flash system depends on Members sharing information and so avoiding repeat incidents. Please consider adding [email protected] to your internal distribution list for safety alerts or manually submitting information on incidents you consider may be relevant. All information is anonymised or sanitised, as appropriate.

IMCA’s store terms and conditions ( apply to all downloads from IMCA’s website, including this document.

IMCA makes every effort to ensure the accuracy and reliability of the data contained in the documents it publishes, but IMCA shall not be liable for any guidance and/or recommendation and/or statement herein contained. The information contained in this document does not fulfil or replace any individual’s or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.