airworthiness · Rule · Final rule. · Published 2019-02-15 · Effective 2019-03-22 · 84 FR 4320
Document
Document number
2019-02453
Federal Register citation
84 FR 4320
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Pratt & Whitney Division (PW) Turbofan
Publication date
2019-02-15
Effective date
2019-03-22
FAA docket
Docket No. FAA-2018-0826
Abstract
We are adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 turbofan engines. This AD was prompted by an in-flight failure of a 1st-stage low-pressure compressor (LPC) blade. This AD requires initial and repetitive thermal acoustic imaging (TAI) inspections for cracks in certain 1st-stage LPC blades and removal of those blades that fail inspection. We are issuing this AD to address the unsafe condition on these products.