# Proposed AD FAA-2023-2147: Pratt & Whitney Canada Corp. Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-03-01
- Products: Pratt & Whitney Canada
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 9, 2023, 88 FR 77236
- Comments due: December 26, 2023
- Became: [AD 2024-03-01](https://openairdocs.org/ad/2024-03-01)
- Docket: FAA-2023-2147 (https://www.regulations.gov/docket/FAA-2023-2147, where comments are filed)
- Project: MCAI-2023-00663-E
- FR document: 2023-24562
- Official PDF: https://openairdocs.org/files/sha256/a1/23/a123dbd2603c8e94f2020f9fcffb3d94949c133d0b622a1fecae4c3b7cbce2cc (from https://www.govinfo.gov/content/pkg/FR-2023-11-09/pdf/2023-24562.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/11/09/2023-24562/airworthiness-directives-pratt-and-whitney-canada-corp-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-24562-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-2147

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) Model PW307A and PW307D engines. This proposed AD was prompted by a root cause analysis of an event involving an uncontained failure of a high-pressure turbine (HPT) 1st-stage disk that resulted in high-energy debris penetrating the engine cowling and an aborted takeoff. This proposed AD would require removing from service and replacing certain HPT disks and would also prohibit installing certain HPT disks on any engine, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 9, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-24562, comments due Dec 26, 2023 (https://www.federalregister.gov/documents/2023/11/09/2023-24562/airworthiness-directives-pratt-and-whitney-canada-corp-engines)

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