Flight Controls – Trimmable Horizontal Stabilizer Actuator – Modification
Superseded. Comply with 2025-0041, which replaces this document.
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators with Group 1 aeroplanes must contact Collins Aerospace within 30 days after 1 January 2025 to receive and implement approved instructions or replace affected THSA parts with serviceable ones. From the effective date, no affected THSA parts may be installed on any aeroplane. Compliance with these actions is mandatory to continue operation.
Summary
EASA Airworthiness Directive 2024-0247 is issued for Airbus A318, A319, A320, A321, A330, and A340 aeroplanes. It addresses issues related to Trimmable Horizontal Stabilizer Actuators (THSA) that have erroneous accumulated life data in their release certificates. This directive applies to specific THSA parts identified by Collins Aerospace and Airbus documentation.
What changed
This new Airworthiness Directive requires operators to reassess the accumulated life of affected THSA parts and prohibits the installation of any affected parts from the effective date. It introduces mandatory contact with Collins Aerospace to obtain approved instructions for corrective actions within 30 days of the directive's effective date or replacement of the affected parts with serviceable ones.
Why it matters
This directive is critical to prevent operation of THSA beyond their certified life limits, which could compromise flight safety. Operators, maintenance organizations, and compliance teams must ensure affected parts are identified and appropriately managed to maintain airworthiness and regulatory compliance. Failure to comply could lead to unsafe conditions and regulatory violations.
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