# Proposed AD FAA-2024-2026: Pratt & Whitney Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-04-13
- Products: Pratt & Whitney
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 19, 2024, 89 FR 67009
- Comments due: October 3, 2024
- Became: [AD 2025-04-13](https://openairdocs.org/ad/2025-04-13)
- Docket: FAA-2024-2026 (https://www.regulations.gov/docket/FAA-2024-2026, where comments are filed)
- Project: AD-2024-00163-E
- FR document: 2024-18354
- Official PDF: https://openairdocs.org/files/sha256/2a/fd/2afd00bdcadb5165b5b9344089198cb57198d51926120a39a4814005a937a755 (from https://www.govinfo.gov/content/pkg/FR-2024-08-19/pdf/2024-18354.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/08/19/2024-18354/airworthiness-directives-pratt-and-whitney-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-18354-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2026

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Pratt & Whitney (PW) Model PW1519G, PW1521G, PW1521GA, PW1521G-3, PW1524G, PW1524G-3, PW1525G, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A engines with a certain high-pressure compressor (HPC) 7th-stage axial rotor installed. This proposed AD was prompted by an analysis of an event involving an International Aero Engines, LLC (IAE LLC) Model PW1127GA-JM engine, which experienced an HPC 7th-stage integrally bladed rotor (IBR-7) separation that resulted in an aborted takeoff. This proposed AD would require performing initial and repetitive angled ultrasonic inspections (AUSI) of certain HPC 7th-stage axial rotors for cracks and replacing the HPC 7th-stage axial rotors if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 19, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-18354, comments due Oct 3, 2024 (https://www.federalregister.gov/documents/2024/08/19/2024-18354/airworthiness-directives-pratt-and-whitney-engines)

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