STC SA4-21
FAA DRS lists SA4-21 as Current · Reissued, held by Staggerwing Museum Foundation Inc., for Hawker Beechcraft Army AT-11 and Hawker Beechcraft C18S. Recorded change: Fuel system modified to provide dual wobble pumps and suction crossfeed and attendant plumbing. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
Fuel system modified to provide dual wobble pumps and suction crossfeed and attendant plumbing.
SA4-21 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: Hawker Beechcraft Army AT-11 and Hawker Beechcraft C18S. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
- 01Does it cover the exact Hawker Beechcraft Army AT-11 and Hawker Beechcraft C18S 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?
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