STC SA5846NM
FAA DRS lists SA5846NM as Current · Reissued, held by Aerosport Fuel Cells, LLC, for Textron Aviation 411, Textron Aviation 421, and Textron Aviation 421A, and 2 more aircraft configurations. Recorded change: Installation of wing tank flexible fuel cells. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
Installation of wing tank flexible fuel cells.
SA5846NM identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.
Applicability
Aircraft named in FAA DRS
Named aircraft: Textron Aviation 411, Textron Aviation 421, and Textron Aviation 421A, and 2 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
- 01Does it cover the exact Textron Aviation 411 and Textron Aviation 421, and 3 more aircraft configurations model, serial range, and configuration?
- 02Which tanks, plumbing, usable-fuel assumptions, and inspections apply?
- 03Who can legally supply the design data, kit, instructions, and ICAs?
- 04What parts, labor, conformity, and return-to-service work are excluded?
Related fuel systems STCs
Installation of substitute fuel quantity units.
FAA holder: Columbia Helicopters Inc
Installation of an additional 12.5-gallon fuel tank in the left wing. Limited to installation on Cessna 170, serial number 18457 ONLY.
FAA holder: Sylvio David Allard
Installation of Jacobs R-755A and R-755B engines modified for fuel injection in accordance with STC SE01288WI. Data required: (1) Butterfly Aviation Master Drawing List Report BA1002-13 dated August 30, 2004, (2) Butterfly Aviation Instructions for Continued Airworthiness Report BA1002-12 dated August 30, 2004, and (3) FAA Approved Airplane Flight Manual Supplement dated November 17, 2004, or later FAA Approved revisions to (1), (2) or (3).
FAA holder: Radial Engines Ltd