Glossary of Airline Terminology

Stage 3 Aircraft

Term used to describe aircraft that meet the Stage 3 noise requirements as specified in FAR Part 36. The Stage 3 requirements specify noise levels that must be certified for the aircraft type at each of three measuring points (flyover, lateral and approach), with the levels varying based on the number of engines and weight of the aircraft. Under U.S. law, but for a few, limited exceptions, all commercial jet aircraft weighing more than 75,000 pounds and operating in the U.S. were required to meet the Stage 3 requirements as of December 31, 1999.

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