FAA Issues Airworthiness Directive for Boeing 747 Models Powered by Pratt & Whitney JT9D Engines

Summary

The FAA has issued an airworthiness directive for certain Boeing 747 models powered by Pratt & Whitney JT9D-3 or JT9D-7 engines, requiring inspections of the aft torque bulkhead and corrective action to prevent cracking of the vertical chords, which could lead to engine separation. The inspections are optional and can be terminated if no issues are found.