# 2025-10332: FAA Proposes Crack Checks for Pratt and Whitney Engine Parts

2025-10332, Airworthiness Directives; Pratt & Whitney Division Engines, is a Federal Register proposed rule from Transportation Department, Federal Aviation Administration published 2025-06-06, effective The FAA must receive comments on this proposed AD by July 21, 2025.; PRIA reads it as touching household money (as of 2026-10-29).

- Canonical: https://policyrisk.com/federal-register/2025-10332
- As of: 2026-10-29
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-10332
- Title: Airworthiness Directives; Pratt & Whitney Division Engines
- Type: Proposed Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 90 FR 24085
- Published: 2025-06-06
- Effective: The FAA must receive comments on this proposed AD by July 21, 2025.
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-10-29

## In one line

FAA Proposes Crack Checks for Pratt and Whitney Engine Parts

## Summary

The FAA wants to keep certain Pratt & Whitney engines safe by checking for cracks in key parts like turbine hubs and disks. If cracks show up, those parts must be fixed or replaced to avoid engine trouble during flights. Engine owners need to act fast and comment by July 21, 2025, or risk costly repairs later.

## Abstract

The FAA proposes to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) Model PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 engines. 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 a high-pressure compressor (HPC) 7th-stage integrally bladed rotor (IBR-7) separation that resulted in an aborted takeoff. This proposed AD would require repetitive angle ultrasonic scan inspections (AUSIs) of the HPC 15th-stage disks, front turbine hubs, high pressure turbine (HPT) 1st-stage air seals, and HPT 2nd-stage hubs for crack indications, and removal from service and replacement if necessary, and for certain serial numbers, removal from service and replacement of the HPT 1st-stage air seal. The FAA is proposing this AD to address the unsafe condition on these products.

## Effects PRIA read

- Mandatory repetitive ultrasonic inspections: cost, medium. If you operate Pratt & Whitney PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, or PW4090-3 engines, you must perform angle ultrasonic scan inspections (AUSIs) of the HPC 15th-stage disks, front turbine hubs, HPT 1st-stage air seals, and HPT 2nd-stage hubs at the next "piece part opportunity" aft…
- Immediate replacement for listed HPT air-seal serials: cost, high. For HPT 1st-stage air seals with the serial numbers listed in table 1 to paragraph (g)(1) of the AD (serial numbers shown as 50L663 and 50L959 in the table), the AD requires removal from service and replacement at the next piece part opportunity after the AD becomes effective. The FAA estimates 6 e…
- Estimated U.S. operator compliance costs: cost, high. The FAA estimates this proposed AD would affect 124 engines on U.S.-registered airplanes. Estimated inspection cost totals for U.S. operators are $42,160 for AUSI of the HPC 15th-stage disk (124 engines × $340) and $52,700 each for AUSIs of the front turbine hub, HPT 2nd-stage hub, and HPT 1st-stag…

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## Sources
- [2025-10332 on federalregister.gov](https://www.federalregister.gov/documents/2025/06/06/2025-10332/airworthiness-directives-pratt-and-whitney-division-engines)
- [2025-10332 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-06-06/pdf/2025-10332.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2025-10332 (as of 2026-10-29).