Engine commissioning

Engine commissioning is the sequence of tests that proves the installed main and auxiliary engines before delivery, run first alongside at the dock trial and completed at the sea trial. It covers the load program from idle through 25, 50, 75, 90, and 100% MCR, the indicator-diagram or indicated-power check at each load, exhaust and bearing temperatures, the governor and overspeed trip, fuel changeover, astern starting, and the crash-stop response. For a two-stroke crosshead engine the cylinder peak pressures and the SFOC are logged against the shop-test and the SFOC guarantee curve. Class witnesses the trips and the safety functions. A failed parameter is corrected and the affected step rerun before the engine is accepted.