EASA AD US-2026-17-03 — Turbine Engine - 3rd-Stage High Pressure Compressor - Replacement

Summary

The Federal Aviation Administration's Airworthiness Directive 2026-17-03 addresses certain International Aero Engines AG Model V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, V2531-E5, and V2533-A5 engines. This directive mandates the replacement of specific 3rd stage high pressure compressor rotor blades due to susceptibility to shroud wear and blade failure. The directive aims to prevent engine fires, unplanned removals, aborted takeoffs, and in-flight shutdowns caused by blade fractures.

What Changed

This new airworthiness directive requires operators to replace affected 3rd stage high pressure compressor rotor blades with parts eligible for installation that feature an improved coating process. It introduces mandatory compliance measures to mitigate the risk of blade fractures and associated unsafe conditions. The directive clarifies that replacement in accordance with IAE AG Service Bulletin V2500-ENG-72-0716, dated October 4, 2024, satisfies compliance requirements.

Why It Matters

This directive is critical for aviation professionals as it addresses a safety risk that can lead to engine fires and in-flight shutdowns, directly impacting flight safety and operational reliability. Operators and maintenance organizations must ensure compliance to avoid unplanned engine removals and aborted takeoffs, which can cause significant operational disruptions and costs. Compliance teams need to update maintenance programs to incorporate these mandatory replacement actions.

What To Do

Affected operators must replace the specified 3rd stage high pressure compressor rotor blades with eligible parts by the effective date of September 24, 2026. Replacement should be performed in accordance with the procedures that demonstrate compliance, such as those outlined in IAE AG Service Bulletin V2500-ENG-72-0716, dated October 4, 2024. Operators should review their maintenance schedules and ensure timely compliance to maintain airworthiness and operational safety.