Commercial aircraft maintenance, repair and overhaul (MRO) is an essential requirement to ensure that aircraft are maintained in pre-determined conditions of airworthiness to safely transport passengers and cargo. Time between overhaul is the manufacturer's recommended number of running hours or calendar time before an aircraft engine or other component requires overhaul.The maintenance of aircraft is highly regulated, in order to ensure safe and correct functioning during flight.The maintenance tasks, personnel and inspections are all tightly regulated and staff must be licensed for the tasks they carry out.Aircraft maintenance is highly regulated, because the smallest slip can lead to an aircraft crashing with consequent loss of life.
