Airworthiness Directives; Dassault Aviation Airplanes
Published Date: 2/6/2026
Proposed Rule
Summary
The FAA wants to update safety rules for certain Dassault Mystere-Falcon 20 airplanes by making maintenance checks tougher and more detailed. This keeps the planes safer by fixing new issues found since last year’s rules. Owners need to update their inspection plans soon and can share their thoughts by March 23, 2026.
Analyzed Economic Effects
3 provisions identified: 0 benefits, 3 costs, 0 mixed.
Must Update Maintenance Programs
If you own or operate a Dassault MYSTERE-FALCON 20-C5, 20-D5, 20-E5, or 20-F5 airplane in the U.S., you must revise your maintenance or inspection program to incorporate the new or more restrictive airworthiness limitations specified in EASA AD 2025-0123. The revision must be done within 90 days after the effective date of this FAA AD and compliance with the revised program is mandatory under 14 CFR 91.403(c).
Per-Operator Cost Estimates
The FAA estimates compliance costs of 90 work-hours at $85 per hour, which it calculates as $7,650 per operator for the retained actions from AD 2023-18-07 and $7,650 per operator for the new proposed actions. The FAA estimates the AD would affect 61 airplanes of U.S. registry.
Short 90‑Day Compliance Deadline
The FAA requires revising the existing maintenance or inspection program within 90 days after the effective date of this AD, rather than the 12-month period referenced in the corresponding EASA AD. Where tasks have initial compliance times, they are due at the applicable limitations or within 90 days after the effective date of this AD, whichever occurs later.
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