# Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
> **Rule** · Final rule. · Published 2017-03-09 · Effective 2017-04-13 · 82 FR 13059
## Document
- **Document number:** 2017-04627
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney Division Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 13059
- **Publication date:** 2017-03-09
- **Effective date:** 2017-04-13
- **FAA docket:** Docket No. FAA-2016-8836
## Abstract

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 an uncontained failure of a high-pressure turbine (HPT) hub during takeoff. This AD requires an inspection to measure the surface condition of the aft side web/rim fillet of HPT 1st stage hubs and removal from service of hubs that fail inspection. We are issuing this AD to correct the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/03/09/2017-04627/airworthiness-directives-pratt-and-whitney-division-turbofan-engines)
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