‘Maximum Engine Overspeed(s)’ (20 second-turbine engines) means the maximum rotational speed of each mechanically independent main rotating system of an engine, inadvertent occurrence of which for periods of up to 20 seconds, has been agreed not to require rejection of the engine from service or maintenance action (other than to correct the cause). NOTE: For each main rotating system this speed is normally not less than the maximum transient rpm in non-fault conditions.
