airworthiness · Rule · Final rule; request for comments. · Published 2022-04-15 · Effective 2022-05-02 · 87 FR 22441
Document
Document number
2022-08045
Federal Register citation
87 FR 22441
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Pratt & Whitney Division Turbofan
Publication date
2022-04-15
Effective date
2022-05-02
FAA docket
Docket No. FAA-2022-0386
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 model turbofan engines. This AD was prompted by an in-flight shutdown (IFSD) of an engine due to an air/oil heat exchanger leak caused by corrosion and subsequent investigation by the manufacturer that revealed additional air/oil heat exchanger leaks. This AD requires an inspection of the air/oil heat exchanger and, depending on the results of the inspection, replacement of the air/oil heat exchanger. This AD also provides instructions for storing an air/ oil heat exchanger after inspection. The FAA is issuing this AD to address the unsafe condition on these products.