Failure of ROV lift umbilical winch brake – Update
In the Safety Flash 09/01 we gave an update on the design problem found in a Macartney Cormax unit manufactured by Norlau (see Safety Flash 08/01 – Failure of ROV lift umbilical winch brake). A member advises that they have determined with the manufacturer of the winches that the hydraulic motors were inadvertently supplied without two check valves being fitted (although the circuit showed them being in place). The manufacturer will be refitting all of the member’s winches with replacement motors. The member understands (but cannot sure) that the manufacturer will be advising all other users of these winches about the problem. The member is continuing to operate the winches in slow speed until each motor has been replaced.
Safety Event
Published: 1 October 2001
Download: 
IMCA SF 11/01
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