# Proposed AD FAA-2026-4643: Pratt & Whitney Division Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2026-21-06
- Products: Pratt & Whitney Division
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 26, 2026, 91 FR 30514
- Comments due: July 10, 2026
- Became: [AD 2026-21-06](https://openairdocs.org/ad/2026-21-06)
- Docket: FAA-2026-4643 (https://www.regulations.gov/docket/FAA-2026-4643, where comments are filed)
- Project: AD-2025-01612-E
- FR document: 2026-10408
- Official PDF: https://openairdocs.org/files/sha256/27/e2/27e24a5ebf244e923777c05dc5b5f7b008382dc46309ef8c33b2172ed12a91c8 (from https://www.govinfo.gov/content/pkg/FR-2026-05-26/pdf/2026-10408.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/05/26/2026-10408/airworthiness-directives-pratt-and-whitney-division-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-10408-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-4643

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) Model PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4460, and PW4462 engines. This proposed AD was prompted by multiple reports of tailpipe fire, loss of thrust control, and engine in-flight shutdown due to undetected deterioration of pressure burner (Pb) sensors. This proposed AD would require replacing Pb sensors. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 26, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-10408, comments due Jul 10, 2026 (https://www.federalregister.gov/documents/2026/05/26/2026-10408/airworthiness-directives-pratt-and-whitney-division-engines)

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