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Department of Transportation
Federal Aviation Administration
• 14 CFR Part 39
• [Docket No. FAA-2025-2553; Project Identifier MCAI-2025-00186-T; Amendment 39-23297; AD 2026-07-02]
• RIN 2120-AA64
AGENCY:
Federal Aviation Administration (FAA), DOT.
ACTION:
Final rule.
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for certain Dassault Aviation Model FALCON 2000EX airplanes. This AD was prompted by a report of simultaneous failures of the main DC buses powered by Generator 1 (GEN1), and Generator 2 (GEN2) after flap extension during approach. This AD requires revising the existing airplane flight manual (AFM). The FAA is issuing this AD to address the unsafe condition on these products.
DATES:
This AD is effective May 11, 2026.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of May 11, 2026.
ADDRESSES:
AD Docket:
You may examine the AD docket at
regulations.gov
under Docket No. FAA-2025-2553; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
• For European Union Aviation Safety Agency (EASA) material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; emailADs@easa.europa.eu.
You may find this material on the EASA website at
ad.easa.europa.eu.
( printed page 17138)
• You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. It is also available atregulations.gov
under Docket No. FAA-2025-2553.
FOR FURTHER INFORMATION CONTACT:
Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7367; email:
9-AVS-AIR-BACO-COS@faa.gov.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Dassault Aviation Model FALCON 2000EX airplanes. The NPRM was published in the
Federal Register
on September 26, 2025 (90 FR 46365). The NPRM was prompted by AD 2025-0042, dated February 19, 2025 (EASA AD 2025-0042) (also referred to as the MCAI), issued by EASA, which is the Technical Agent for the Member States of the European Union. The MCAI states there was a report of simultaneous failures of the main DC buses powered by GEN1 and GEN2 after flap extension during approach. This event resulted in intermittent crew alerting system (CAS) messages, including the red CAS message “2 GEN'S FAIL,” data flickering on the display units, and flashi…
Fonte: Federal Register (federalregister.gov). Texto original em inglês. Conteúdo sanitizado por segurança.