# Proposed AD FAA-2021-0447: Pratt & Whitney Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-17-09
- Products: Pratt & Whitney
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 3, 2021, 86 FR 29707
- Comments due: July 19, 2021
- Became: [AD 2021-17-09](https://openairdocs.org/ad/2021-17-09)
- Docket: FAA-2021-0447 (https://www.regulations.gov/docket/FAA-2021-0447, where comments are filed)
- Project: AD-2021-00131-E
- FR document: 2021-11565
- Official PDF: https://openairdocs.org/files/sha256/ad/cb/adcb0dac11e6034aaa2c5f082c5e04e89e9d07c34ad1a50496c9dc9c661484c4 (from https://www.govinfo.gov/content/pkg/FR-2021-06-03/pdf/2021-11565.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/06/03/2021-11565/airworthiness-directives-pratt-and-whitney-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/00ED6385142464AB862586E9007436C2.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0447

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney (PW) PW1500G and PW1900G series turbofan engines. This proposed 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 proposed AD would require removal and replacement of the HPC front hub and HPC rotor shaft. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 3, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-11565, comments due Jul 19, 2021 (https://www.federalregister.gov/documents/2021/06/03/2021-11565/airworthiness-directives-pratt-and-whitney-turbofan-engines)

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