STC ST09975SC
FAA DRS lists ST09975SC as Current · Reissued, held by Sierra Industries Ltd., for Textron Aviation 500. Recorded change: Optimal maximum zero fuel weight (MZFW) increase for aircraft modified per STC SA2172NM installation of LONGWING Modification including wing tip extensions, extended pneumatic de-ice boot, increased fuel capacity, and other minor refinements. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
ST09975SC 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 500. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
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