Transport i infrastruktura · 25/10/1994

Boeing Issues Airworthiness Directive for 747-400 Series Airplanes with PW4000 Engines

The Federal Aviation Administration (FAA) has adopted a new airworthiness directive requiring the replacement of thrust reverser flow restrictor devices with one-way valve restrictors on certain Boeing Model 747-400 series airplanes equipped with Pratt & Whitney PW4000 series engines to address reports of actuator piston seal leakage.