Summary
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.
Directive Details
AD Number
FAA-2017-0719
Document Number
2018-00999
Type
Rule
Publication Date
January 22, 2018
Effective Date
February 26, 2018
Affected Manufacturer
Pratt & Whitney Division Turbofan
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2017-0719
Topics
Official Documents
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