# Proposed AD FAA-2019-0395: Pratt & Whitney Canada Corp. Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-13-06
- Products: Pratt & Whitney Canada
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 24, 2019, 84 FR 29419
- Comments due: August 8, 2019
- Became: [AD 2020-13-06](https://openairdocs.org/ad/2020-13-06)
- Docket: FAA-2019-0395 (https://www.regulations.gov/docket/FAA-2019-0395, where comments are filed)
- FR document: 2019-13193
- Official PDF: https://openairdocs.org/files/sha256/4e/5e/4e5e7f9802909ba1aa65d6a3fa044c536b8bc6d6325761417ab9269fc3c9efda (from https://www.govinfo.gov/content/pkg/FR-2019-06-24/pdf/2019-13193.pdf)
- Federal Register: https://www.federalregister.gov/documents/2019/06/24/2019-13193/airworthiness-directives-pratt-and-whitney-canada-corp-turboprop-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/404C892ABD2C871C862584230052F929.0001
- Page: https://openairdocs.org/proposed/FAA-2019-0395

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (P&WC) PW150A turboprop engines. This proposed AD was prompted by a determination by the manufacturer that certain PW150A engine high-pressure (HP) centrifugal impellers may exhibit a material microstructure anomaly that has a potential to adversely affect the low cycle fatigue characteristics of the part. This proposed AD would require replacement of the affected HP centrifugal impellers. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 24, 2019: Notice of proposed rulemaking (NPRM). (first notice), FR document 2019-13193, comments due Aug 8, 2019 (https://www.federalregister.gov/documents/2019/06/24/2019-13193/airworthiness-directives-pratt-and-whitney-canada-corp-turboprop-engines)

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