Routine Maintenance 5.3 Maintenance Work Completed Date Op. hours * following commissioning of new and overhauled engines. 50-150* 125 375 625 875 1125 1375 1625 1875 2115 2375 2625 © 2001 5 50-150* – 125 250 375 500 625 750 875 1000 1125 1250 1375 1500 1625 1750 1875 2000 2115 2250 2375 2500 2625 2750 * following commissioning of new and overhauled engines. Duly completed maintenance jobs can be recorded and signed off in the above chart.