# Airworthiness Directives; Pratt & Whitney Turbofan Engines
> **Rule** · Final rule. · Published 2021-08-18 · Effective 2021-09-22 · 86 FR 46111
## Document
- **Document number:** 2021-17654
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 46111
- **Publication date:** 2021-08-18
- **Effective date:** 2021-09-22
- **FAA docket:** Docket No. FAA-2021-0447
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney PW1500G and PW1900G series turbofan engines. This AD was prompted by reports of cracks in the high-pressure compressor (HPC) rotor shaft that resulted in in-flight shutdowns (IFSDs) and unscheduled engine removals (UERs). This AD requires removal and replacement of the HPC front hub and HPC rotor shaft. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/08/18/2021-17654/airworthiness-directives-pratt-and-whitney-turbofan-engines)
---
*AI Analytics · CC0 1.0*