# Proposed AD FAA-2021-0515: Pratt & Whitney Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-20-01
- Products: Pratt & Whitney
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 29, 2021, 86 FR 34166
- Comments due: June 29, 2021
- Became: [AD 2021-20-01](https://openairdocs.org/ad/2021-20-01)
- Docket: FAA-2021-0515 (https://www.regulations.gov/docket/FAA-2021-0515, where comments are filed)
- Project: AD-2021-00191-E
- FR document: 2021-13709
- Official PDF: https://openairdocs.org/files/sha256/85/cc/85cc2596a2227152bf52f75cf7e58048df26d2b1ec1346a2006779e7b11fb796 (from https://www.govinfo.gov/content/pkg/FR-2021-06-29/pdf/2021-13709.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/06/29/2021-13709/airworthiness-directives-pratt-and-whitney-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/36DA345F3AA56C8986258703004BF98C.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0515

## Summary

The FAA proposes to adopt 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 proposed 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 proposed AD would require 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 proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 29, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-13709, comments due Jun 29, 2021 (https://www.federalregister.gov/documents/2021/06/29/2021-13709/airworthiness-directives-pratt-and-whitney-turbofan-engines)

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