![]() ![]() ![]() The term “half-life” refers to the airframe, engines, (propellers, blades, gearboxes where relevant) landing gear, APU and all major components being halfway between major overhauls, inspections or performance restorations as appropriate with engine life limited parts (LLPs) having 50% of their certified lives remaining. It does not indicate that the aircraft is half-way through its useful life. It thus enables a comparison to be made between values of aircraft of different types and ages using a common denominator. Sometimes also known as half-time – is a standard industry appraisal term to indicate that no value adjustment has been made for the actual maintenance status of the aircraft. ![]()
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