On 3/21/2009 , the vessel MAERSK CHALLENGER (Official Number 824374) was involved in a total failure of any machinery or technical system in OFF LIBERIA, AFRICA,.

The vessel, with 11 persons on board, experienced the incident while engaged in regular operations. There were 0 injuries and fatalities were reported, and there was pollution.

On 21 March 2009, the AHTS "MAERSK CHALLENGER" with 11 POB reported a crankcase explosion in it's number one main engine. No reports of damage.. Damage to the vessel was indicated as UNKNOWN

Weather at the time was reported as clear. This incident was officially recorded by Transport Canada on 4/20/2009 .