Regulation & law · 18/11/1999

Pratt & Whitney JT9D-7R4 Series Turbofan Engines: Correction to Airworthiness Directive AD 99-20-04

The Federal Aviation Administration (FAA) has corrected Airworthiness Directive (AD) 99-20-04, which applies to certain Pratt & Whitney (PW) JT9D series turbofan engines, to correct references to HPC disk fracture and an incorrect service bulletin (SB) reference in the compliance section. The corrected rule reinstates the original compliance requirements published in the Notice of Proposed Rulemaking (NPRM)