Engine — Non-Synchronous Vibration During Engine Operation — Monitoring / Replacement
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must evaluate non-synchronous vibration within 50 flight cycles after 13 November 2025 and every 50 flight cycles thereafter for engines with affected parts. If issues are found, affected parts must be replaced and inspections performed before engine return to service. Installation of affected parts is prohibited from the effective date, and replacement is required at the next engine shop visit if not already done.
Summary
EASA Airworthiness Directive 2025-0246 is issued for CFM International LEAP-1A engines installed on certain Airbus A319, A320, and A321 aircraft. It addresses non-synchronous vibration issues caused by affected bearing No. 3 spring finger housing parts, which may lead to engine stalls or turbine failures. The directive mandates monitoring and replacement of these parts to ensure continued airworthiness.
What changed
This new Airworthiness Directive introduces mandatory non-synchronous vibration monitoring for LEAP-1A engines with affected parts and requires replacement of these parts during engine shop visits or when discrepancies are detected. It also prohibits installation of affected parts on any engine from the effective date.
Why it matters
This directive is critical for operators and maintenance organizations to prevent potential engine stalls and turbine failures caused by accelerated wear of specific bearing housings. Compliance ensures flight safety by mitigating risks of high-energy debris release and engine damage, thus maintaining aircraft operational integrity.
More for CFM International LEAP-1A
All 21- EASA SIB 2025-06R1Potential Risk Management Issue after Engine Load Reduction Device ActivationOct 1, 2026
- EASA AD 2025-0171R2Engine – High Pressure Turbine Rotor Stage 1 Blade – InspectionJul 3, 2026
- EASA PAD 26-006Engine — Full Authority Digital Electronic Control Software — ReplacementJan 16, 2026
- EASA AD 2025-0243Engine — Forward Outer Seal, High-Pressure Compressor Stages 6-10 Compressor Rotor Spools and High-Pressure Turbine Rotor Stage 1 Disks — ReplacementOct 28, 2025
Get the next one by email
New ADs and bulletins for CFM International LEAP-1A and International LEAP-1C, summarized like this page, every Monday.