STC ST09011SC
FAA DRS lists ST09011SC as Current · Reissued, held by Sierra Industries Ltd., for Textron Aviation 500, Textron Aviation 550, and Textron Aviation S550. Recorded change: Installation of a pilot's, control wheel mounted, alternate gear horn silence switch. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
Installation of a pilot's, control wheel mounted, alternate gear horn silence switch.
ST09011SC 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, Textron Aviation 550, and Textron Aviation S550. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
- 01Does it cover the exact Textron Aviation 500 and Textron Aviation 550, and 1 more aircraft configuration model, serial range, and configuration?
- 02Which gear, wheel, brake, tire, and hydraulic configurations apply?
- 03Who can legally supply the design data, kit, instructions, and ICAs?
- 04What parts, labor, conformity, and return-to-service work are excluded?
Related landing gear and brakes STCs
Installation of modified Navion main landing gear wheel and axle. Eligible only on the Navion aircraft models which have Goodrich (Hayes expander tube brakes) wheels Models 6057MD or G-14-720-NO-1.
FAA holder: General Aviation Modifications Inc.
Installation of a Wheel Well Conduit and WIRE Harness.
FAA holder: Safran Electrical Components USA Inc.
Installation of Landing Gear Harness/Conduit Replacement.
FAA holder: Safran Electrical Components USA Inc.
Installation of a Replacement Landing Gear Wiring Harness.
FAA holder: Safran Electrical Components USA Inc.