Aircraft maintenance relates to the inspection, repair, modification, replacement and overhaul of aircraft equipment to ensure that an aircraft is in optimal condition and most importantly, safe for flying. Aircrafts, such as aeroplanes and helicopters, are often subject to undergo routine maintenance after a certain number of flight hours or flight cycles. During this time, aircraft maintenance engineers and technicians perform inspections to ensure the quality and airworthiness of aircrafts. Some of the tasks include replacing worn or damaged components, testing engine operation to detect malfunctions and inspecting engine parts such as turbine blades and cylinders for wear, warping and leaks.