# Airworthiness Directives; Pratt & Whitney Engines
> **Rule** · Final rule. · Published 2025-03-04 · Effective 2025-04-08 · 90 FR 11099
## Document
- **Document number:** 2025-03441
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 90 FR 11099
- **Publication date:** 2025-03-04
- **Effective date:** 2025-04-08
- **FAA docket:** Docket No. FAA-2024-2026
## Abstract

The FAA is adopting 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 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 AD requires 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 issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/03/04/2025-03441/airworthiness-directives-pratt-and-whitney-engines)
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