Airworthiness Directive · Amendment 39-12080 · Boeing Model 747-400, 747-400F, 767-200, and 767-300 Series Airplanes Equipped With Pratt & Whitney Model PW4000 Series Engines
Boeing Model 747-400, 747-400F, 767-200, and 767-300 Series Airplanes Equipped With Pratt & Whitney Model PW4000 Series Engines
Model 747-400, 747-400F, 767-200, and 767-300 series airplanes equipped with Pratt & Whitney Model PW4000 series engines; certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to all Boeing Model 747-400, 747-400F, 767-200, and 767- 300 series airplanes equipped with Pratt & Whitney Model PW4000 series engines. This action requires revising the Airplane Flight Manual (AFM). This action is necessary to prevent reduced acceleration and climb performance relative to performance data in the AFM, which could result in runway overruns or impact with obstacles or terrain. This action is intended to address the identified unsafe condition.
