Common issues caused by frequent variations in load
– Heavy oil coking during every overhaul;
– Oil leakage and smoke issues in the summer;
– Turbine blades were found thinner and below required service dimensions;
– Nozzle ring blades were bent;
– The piston ring sitting area was worn due to the heavy oil coking issue;
– Gas leakage from turbine casing inlet and engine below due to erosion of the casing surface.