airworthiness · Rule · Final rule. · Published 2018-06-15 · Effective 2018-07-20 · 83 FR 27889
Document
Document number
2018-12830
Federal Register citation
83 FR 27889
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Pratt & Whitney Division Turbofan
Publication date
2018-06-15
Effective date
2018-07-20
FAA docket
Docket No. FAA-2017-0817
Abstract
We are adopting a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) PW4052, PW4056, PW4060, PW4062, PW4062A, PW4152, PW4156A, PW4158, PW4460, and PW4462 turbofan engine models, including engines identified with suffixes -1C, -1E, -3, -3A, or -3B. This AD was prompted by the discovery of multiple cracked 4th stage low-pressure turbine (LPT) air seals in the fleet. This AD requires removal from service of certain 4th stage LPT air seals. We are issuing this AD to address the unsafe condition on these products.