Reproduced by Kind Permission of The US Coastguard.
This was reported on 23rd February 2004.
Last Fall a foreign flagged containership during a coastwise voyage reported upon leaving port that the vessel’s second engineer was missing. Despite an extensive search by the vessel’s crew and officers, the individual was presumed to have gone ashore and missed the sailing. Upon arrival at the following port the individual was found deceased behind an access door to the main propulsion engine’s scavenging air receiver.
The vessel was powered by a Burmeister & Wain, 9 cylinder two stroke engine that develops over fifty-five thousand horsepower. The engine’s scavenging air space can be accessed by two manholes located on both ends of the scavenging air receiver.
These circular manholes are secured by three L-shaped dogs having an outer edge that is tightened against an inner circumferential lip on the edge of the access hole. Tightening is achieved by the use a handled fastener.
Coast Guard investigators determined that the engineer entered the scavenging air receiver alone. Although his reason for entering the receiver is not known, engine maintenance was performed in that space while at the first port and he may have returned to inspect the area for left behind tools and materials or to retrieve something. It appears that after his entry, the easily moved hinged / inward-opening door accidentally closed. Investigators believe that at that time, the upper left dog due to its weight and perhaps the vibration of the door as it closed, caused the dog to move allowing its edge to catch the circumferential lip at the opening. Once caught, even with the loosened fastener the door could no longer be opened from the inside of the receiver.
The second engineer was an experienced mariner. It was reported that he was trained and familiar with the vessel's confined space entry procedure. In all previous instances, he followed the procedures and safely performed maintenance inside the space. Unfortunately, on this occasion he entered without informing anyone or having an assistant stationed outside. Despite various searches by the crew within the machinery spaces and the main engine while the vessel was preparing to sail, he went unnoticed.
Mariners may on occasion not associate certain work areas as confined spaces and therefore not take the precautionary steps needed. Main engine crankcases, scavenging air spaces, exhaust ducting, boiler drums, furnaces, stack casings, condensers, sewage plant tanks and other systems, equipment, and components may present potential “confined space" type hazards.
A confined space may be defined as any location that, by design, has limited openings for entry or egress and is not intended for continuous human occupancy. This definition applies regardless of whether or not the atmosphere is explosive or toxic. See related US Department of Labor, Occupational Safety & Health Administration information by clicking here.
In this casualty, there was initially sufficient quantities of oxygen for the second engineer to breath, at least until the engine started causing the ambient environmental conditions inside the receiver to change dramatically and cause the fatality.
The Coast Guard strongly recommends that: