airworthiness · Rule · Final rule. · Published 2018-01-22 · Effective 2018-02-26 · 83 FR 2896
Document
Document number
2018-00999
Federal Register citation
83 FR 2896
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Pratt & Whitney Division Turbofan
Publication date
2018-01-22
Effective date
2018-02-26
FAA docket
Docket No. FAA-2017-0719
Abstract
We are adopting a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 turbofan engines. This AD was prompted by the discovery of multiple cracked outer diffuser cases. This AD requires initial and repetitive inspections to detect cracks in the outer diffuser case and removal from service of cases that fail inspection. We are issuing this AD to address the unsafe condition on these products.