EASA AD CF-2025-07
Flight Controls — Horizontal Stabilizer Trim Actuator (HSTA) — Incorrect Installation of the Interface Pin in the Upper Gimbal
Summary
Canadian Airworthiness Directive CF-2025-07 addresses a safety issue in Airbus Canada Limited Partnership aircraft models BD-500-1A10 and BD-500-1A11. The directive concerns the incorrect installation of the interface pin in the upper gimbal of the Horizontal Stabilizer Trim Actuator (HSTA). It mandates inspection and correction to ensure proper mechanical connection of the horizontal stabilizer.
What Changed
CF-2025-07 introduces a new requirement for operators of specified Airbus Canada aircraft to inspect the interface pin installation in the HSTA upper gimbal. If the pin is found incorrectly installed, the directive requires immediate modification before further flight. This is a newly issued airworthiness directive to address a production quality escape.
Why It Matters
This directive is critical for maintaining flight safety by preventing a potential mechanical disconnect of the horizontal stabilizer, which could lead to loss of aircraft control. Operators, maintenance organizations, and compliance teams must ensure timely inspections and corrections to avoid unsafe conditions and regulatory non-compliance.
What To Do
Operators of Airbus Canada BD-500-1A10 and BD-500-1A11 aircraft must perform a detailed visual inspection of the HSTA interface pin within 3000 flight hours from February 10, 2025. If the pin is incorrectly installed, it must be corrected before the next flight following the procedures in ACLP Service Bulletin BD500-274007. Compliance with these actions is mandatory.