EASA AD 2026-0145R1 — Flight Controls – Maintenance and Avionics Interface Computer Software – Modification

Summary

EASA Airworthiness Directive 2026-0145R1 is issued for Dassault Aviation Falcon 7X aeroplanes, serial numbers 2 through 400 inclusive, that have not embodied modification M1000. This directive addresses maintenance and avionics interface computer software modifications related to flight controls, specifically targeting the inboard slats extension failure issue during landing. It mandates updates to the Maintenance and Avionics Interface Computer (MAIC) software and amendments to the Aeroplane Flight Manual (AFM).

What Changed

EASA Airworthiness Directive 2026-0145R1 revises the previous AD 2026-0145 by clarifying requirements and allowing deferral of AFM amendments for aeroplanes that have embodied the original issue of Dassault Service Bulletin 7X-650. It introduces the requirement to upgrade MAIC software per SB 7X-650 Revision 1 and mandates the implementation of AFM Change Project CP0189 after modification. Additional concurrent modification requirements and credit provisions for prior compliance are also included.

Why It Matters

This directive is critical for aviation professionals as it addresses a safety issue where failed inboard slat extension during landing was not indicated to flight crews, potentially reducing lift and control. Operators and maintenance organizations must ensure compliance to maintain aircraft airworthiness and crew situational awareness. The AD impacts maintenance planning, software updates, and flight manual procedures, ensuring safer operation of affected Falcon 7X aircraft.

What To Do

Operators of affected Falcon 7X aeroplanes must incorporate AFM CP0188 within 10 flight cycles after 8 August 2022 if in Group 1, upgrade the MAIC software within 12 months after 6 August 2026, and implement AFM CP0189 before the next flight after modification. Additionally, certain concurrent modifications per Dassault SB 7X-436 Rev. 1 are required prior to software upgrade. Compliance deadlines and credit for prior modifications are specified in the directive.