SAFETY BULLETIN NRB21-04 - KINGS CROSS REMODELLING RUNAWAY MEWP SAFETY BULLETIN NRB21-04 - KINGS CROSS REMODELLING RUNAWAY MEWP SAFETY BULLETIN NRB21-04 – KINGS CROSS REMODELLING RUNAWAY MEWP OVERVIEW On 16th May 2021 at around 03:30am Pod-Trak were on-tracking their Mobile Elevating Work Platforms (MEWPs) for OLE works. While ontracking the third MEWP, it ran away approximately 600m into Canal Tunnel. The MEWP ran through the worksite marker but remained within the possession limits. The team working with the MEWP were unharmed. RAIB inspected the MEWP to establish if there was a mechanical failure. The initial findings were that there appeared to be insufficient brake force to hold the MEWP on the Road Rail Access Point which had a 1.55 gradient. Later, under test conditions, the MEWP started to move at a gradient of 1.50. A further test was conducted with the hydraulic brake bypass valve closed during the test. When retested, the MEWP braking system worked correctly. The cause of the runaway appears to be that the override valve for the rail wheel parking brake system had been left in bypass during maintenance sometime before the shift. A second Safety Bulletin will be issued if any further learning is identified. DISCUSSION POINTS What checks are undertaken after maintenance to ensure plant is correctly set up to be used on site? What assurance is done by plant providers to confirm that maintenance checks are completed correctly and it is ready for use? What simple checks can be undertaken at site to assure users that kit has been safely maintained? How should we consider runaway risk during planning? DOWNLOAD THE SAFETY BULLETIN Acknowledgement Slip Date * Date First Name * First Name Surname * Surname Phone Number * Phone Number E Mail Address * Email Address Company Division * Company Division Training TeamPlant TeamTransport TeamResourcing TeamHQ Support TeamSponsored Staff Do You Have Any Questions? * YES NO You Indicated That You Have Questions, Please Let us Know What they Are * Acknowledgement * Acknowledgement I Have Read & Understood The BriefI Don't Understand The Brief & Require More Information You Indicated That You Did Not Understand The Briefing, Please Let Us Know Why So We Can Clarify It For You * Signature * Clear If you are human, leave this field blank. Submit
