FAA has adopted a new noise standard that will result in a volume decrease of seven decibels (dBs) for certain newly designed subsonic aircraft. The ruling, called Stage 5 Airplane Noise Standards, is set to take effect Jan. 1, 2018, and will apply to any new aircraft design with a maximum takeoff weight (MTOW) of 121,254 lbs. (55,000 kg) or more submitted on or after Dec. 31, 2017, or to any new aircraft design with a MTOW of less than 121,254 lbs. submitted on or after Dec. 31, ...

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