# Proposed AD FAA-2019-0365: Pratt & Whitney Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-16-15
- Products: Pratt & Whitney
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 31, 2019, 84 FR 25203
- Comments due: July 15, 2019
- Became: [AD 2019-16-15](https://openairdocs.org/ad/2019-16-15)
- Docket: FAA-2019-0365 (https://www.regulations.gov/docket/FAA-2019-0365, where comments are filed)
- FR document: 2019-11285
- Official PDF: https://openairdocs.org/files/sha256/66/f6/66f65835dca8d1a4c0e2abc7245198515f88f264ee6d78d8aac532e2036668c9 (from https://www.govinfo.gov/content/pkg/FR-2019-05-31/pdf/2019-11285.pdf)
- Federal Register: https://www.federalregister.gov/documents/2019/05/31/2019-11285/airworthiness-directives-pratt-and-whitney-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8C25586A407CD4CD8625840B0047A00F.0001
- Page: https://openairdocs.org/proposed/FAA-2019-0365

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney (PW) PW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A model turbofan engines. This proposed AD was prompted by corrosion found on the high-pressure compressor (HPC) front hub, which could result in certain HPC front hubs cracking before reaching their published life limit. This proposed AD would require revisions to the Airworthiness Limitations Section (ALS) of the manufacturer's Instructions for Continued Airworthiness (ICA) and air carrier's approved Continued Airworthiness Maintenance Programs (CAMP) to incorporate new or more restrictive airworthiness limitations. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 31, 2019: Notice of proposed rulemaking (NPRM). (first notice), FR document 2019-11285, comments due Jul 15, 2019 (https://www.federalregister.gov/documents/2019/05/31/2019-11285/airworthiness-directives-pratt-and-whitney-turbofan-engines)

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