# Airworthiness Directives; Pratt & Whitney Turbofan Engines
> **Rule** · Final rule. · Published 2019-03-12 · Effective 2019-04-16 · 84 FR 8802
## Document
- **Document number:** 2019-04388
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 84 FR 8802
- **Publication date:** 2019-03-12
- **Effective date:** 2019-04-16
- **FAA docket:** Docket No. FAA-2018-0624
## Abstract

We are superseding Airworthiness Directive (AD) 2017-11-06, for all Pratt & Whitney (PW) PW2037, PW2037D, PW2037M, PW2040, PW2040D, PW2043, PW2143, PW2643, and F117-PW-100 turbofan engine models. AD 2017-11-06 required initial and repetitive on-wing eddy current inspections (ECIs) of affected engines with certain diffuser and high- pressure turbine (HPT) cases installed. AD 2017-11-06 also required a fluorescent-penetrant inspection (FPI) of the diffuser case rear flange and the HPT case front flange. This AD requires an on-wing ECI of all diffuser case M-flange replacement repairs. This AD was prompted by a rupture of the diffuser-to-HPT case flange. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/03/12/2019-04388/airworthiness-directives-pratt-and-whitney-turbofan-engines)
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