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A new FAA airworthiness directive effective May 29 requires Dassault Falcon 20 C5, D5, E5, and F5 operators to revise their maintenance and inspection programs to address fatigue cracking, damage tolerance, and corrosion in principal structural elements. The directive, published in the Federal Register as AD 2026-10801, is mandatory — not optional, and adds another layer of compliance cost to an airframe that first flew in 1963.For active Falcon 20 operators, the immediate call to action is straightforward: confirm your maintenance program is updated and document compliance. But the AD is also a useful reminder of a dynamic that repeats itself across every aging jet platform.
Older aircraft don't depreciate in a linear fashion. Purchase prices fall, sometimes off a cliff, and that's typically when the low entry cost looks good on paper. But the operating cost curve bends in the other direction. As airframes accumulate cycles and calendar time, ADs multiply, inspection intervals tighten, and once routine parts become expensive or hard to source. What looked like a bargain at acquisition can quietly become one of the most expensive aircraft in the hangar.
The Falcon 20 is a capable twin. Back in FedEx's early days (Federal Express for those keeping track), its freight operation was built around this airframe as it helped establish the light cargo and medevac market. Its capabilities are proven, but "capable" and "economical to operate" are not necessarily synonymous as this AD showcases that distinction. Structural inspection requirements tied to fatigue cracking and corrosion in principal elements aren't paperwork nuisances. Beyond the obvious catastrophic consequences, they can ground aircraft, trigger expensive repairs, and complicate resale.
For anyone considering a Falcon 20 acquisition, AD 2026-10801 just became a line item in the prebuy checklist. Verify compliance status, review the maintenance records for any open findings related to the structural elements in scope, and price the cost of full compliance into your offer.
The broader lesson applies beyond this specific airframe: many older jets have a version of this story. The question for buyers is never just what the aircraft costs today. It's what the aircraft will cost to keep legal, airworthy, and insurable over the next five years and beyond.
Searching for Falcon 20s or other pre-owned aircraft? Browse current listings on GlobalAir and check model pages for AD history and operating cost context before you write an offer.