Other bolts within the engine's hot box were also found broken. The involved engine was a Wartsila model VASA12V32LNE also referenced as a VASA 32. It is a very common engine with thousands operating in ship and shore side service. Over its service life the manufacturer has produced a number of technical bulletins and service letters related to the fuel system piping, shielding of hot surfaces, other fire protection devices, and availability of components to meet SOLAS requirements. In its service letters Wartsila notes that fuel pipes leading to and from the injection pumps are subject to pressure pulses derived from the injection pumps, vibrations caused by normal engine vibrations, and static stresses caused by heat expansion. Any repairs or modifications to the fuel system must follow manufacturer guidance provided in associated manuals, bulletins, and service letters.