airworthiness · Rule · Final rule. · Published 2019-04-04 · Effective 2019-04-30 · 84 FR 13108
Document
Document number
R1-2019-05708
Federal Register citation
84 FR 13108
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Pratt & Whitney Division Turbofan
Publication date
2019-04-04
Effective date
2019-04-30
FAA docket
Docket No. FAA-2018-0924
Abstract
We are adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4158 turbofan engines. This AD was prompted by several reports of high cycle fatigue (HCF) cracks found in the fuel nozzle supply manifold. This AD requires replacement of the affected fuel nozzles and fuel nozzle manifold supply assemblies with parts eligible for installation. This AD also requires installation of new brackets and clamps on the fuel nozzle supply manifold assemblies. We are issuing this AD to address the unsafe condition on these products.