Flight Controls — Trimmable Horizontal Stabilizer Actuator — Replacement
- Published
- Effective
- Deadline
- Replaces
- 2020-0073
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Airbus A318, A319, A320, and A321 aircraft with affected THSA parts must replace these parts with serviceable ones within 15 days after 2 April 2020, if not already done. From 5 November 2024, no affected THSA parts may be installed on any aircraft covered by this AD, including the A321-253NY. Compliance must follow the instructions provided in Airbus Alert Operators Transmission A27N013-20.
Summary
EASA Airworthiness Directive 2024-0203 is an airworthiness directive addressing the replacement of trimmable horizontal stabilizer actuators (THSA) on Airbus A318, A319, A320, and A321 aircraft models, including the newly certified A321-253NY. The directive mandates the replacement of affected THSA parts identified by serial numbers to ensure continued safe operation of the flight controls. It applies to all manufacturer serial numbers of the specified aircraft models.
What changed
EASA Airworthiness Directive 2024-0203 supersedes the previous AD 2020-0073 and extends its applicability to include the Airbus A321-253NY model, prohibiting installation of affected THSA parts on this new model. The directive retains all previous requirements for other affected aircraft and updates the list of affected parts. It also clarifies compliance deadlines and installation prohibitions for affected and serviceable parts.
Why it matters
This directive is critical for aviation professionals because it addresses a potential unsafe condition caused by deviations in the maintenance acceptance test procedure of certain THSA parts. If uncorrected, this issue could compromise the failsafe function of the stabilizer actuator, risking loss of aircraft control. Operators, maintenance organizations, and compliance teams must ensure affected parts are replaced promptly to maintain airworthiness and regulatory compliance.
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