airworthiness · Rule · Final rule. · Published 2017-06-15 · Effective 2017-07-20 · 82 FR 27411
Document
Document number
2017-12074
Federal Register citation
82 FR 27411
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Pratt & Whitney Division Turbofan
Publication date
2017-06-15
Effective date
2017-07-20
FAA docket
Docket No. FAA-2016-9405
Abstract
We are adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW2037, PW2037M, and PW2040 turbofan engines. This AD was prompted by an unrecoverable engine in-flight shutdown (IFSD) after an ice crystal icing event. This AD requires installing a software standard eligible for installation and precludes the use of electronic engine control (EEC) software standards earlier than SCN 5B/I. We are issuing this AD to correct the unsafe condition on these products.