# Airworthiness Directives; Pratt & Whitney Turbofan Engines
> **Rule** · Final rule. · Published 2021-09-22 · Effective 2021-10-27 · 86 FR 52600
## Document
- **Document number:** 2021-20365
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 52600
- **Publication date:** 2021-09-22
- **Effective date:** 2021-10-27
- **FAA docket:** Docket No. FAA-2021-0515
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney PW1500G and PW1900G series turbofan engines with a certain high-pressure turbine (HPT) 1st-stage hub or HPT rotor 1st- stage blade retaining plate installed. This AD was prompted by a report from the manufacturer who determined that the HPT 1st-stage hub and HPT rotor 1st-stage blade retaining plate fail to meet the published life- cycle limits for each part. This AD requires removal and replacement of the HPT 1st-stage hub and HPT rotor 1st-stage blade retaining plate prior to reaching certain cycle limits. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/22/2021-20365/airworthiness-directives-pratt-and-whitney-turbofan-engines)
---
*AI Analytics · CC0 1.0*