airworthiness · Rule · Final rule; request for comments. · Published 2022-06-17 · Effective 2022-07-05 · 87 FR 36390
Document
Document number
2022-13088
Federal Register citation
87 FR 36390
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Pratt & Whitney Division Turbofan
Publication date
2022-06-17
Effective date
2022-07-05
FAA docket
Docket No. FAA-2022-0589
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4062 model turbofan engines. This AD was prompted by a report of a manufacturing quality escape due to insufficient cooling of the low-pressure turbine (LPT) stage 5 air seal resulting in a reduction of the low-cycle fatigue (LCF) life limit. This AD requires removal and replacement of the LPT stage 5 air seal with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.