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Engine and powerplant

STC SA4774NM

FAA DRS lists SA4774NM as Current · Reissued, held by Seaplane Works Inc., for Gulfstream American G-44, Gulfstream American G-44A, and Gulfstream American SCAN Type 30. Recorded change: Removal of the two existing engines and installation of one AVCO Lycoming Model TIO-540-J2BD and one LTIO-540-J2BD engine with Hartzell Model HC-C3YR-2UF/FC9587A-10 and HC-C3YR-2LUF/FJC9587A-10 propellers. Snapshot dated June 30, 2026.

FAA-listed holder
Seaplane Works Inc.
Aircraft configurations
3
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Removal of the two existing engines and installation of one AVCO Lycoming Model TIO-540-J2BD and one LTIO-540-J2BD engine with Hartzell Model HC-C3YR-2UF/FC9587A-10 and HC-C3YR-2LUF/FJC9587A-10 propellers.

SA4774NM 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: Gulfstream American G-44, Gulfstream American G-44A, and Gulfstream American SCAN Type 30. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Gulfstream American G-44A-734Gulfstream American G-44AA-734Gulfstream American SCAN Type 30A-734

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Gulfstream American G-44 and Gulfstream American G-44A, and 1 more aircraft configuration model, serial range, and configuration?
  2. 02Which powerplant configuration, limits, instruments, and maintenance data apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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