FAA Revises Airworthiness Directive for Pratt & Whitney JT9D-3A Engines to Prevent Engine Fires

Summary

The Federal Aviation Administration (FAA) is revising an existing airworthiness directive for Pratt & Whitney JT9D-3A engines to correct errors in clamping and relax maintenance requirements, aiming to prevent engine fires caused by failed gearbox pressure tubes or No. 4 bearing front pressure manifolds.