STC SP00177SE
FAA DRS lists SP00177SE as Current · Amended, held by Fine Line Designs, for Hartzell Propeller HC-12X and Hartzell Propeller HC-12V. Recorded change: Replacement of the engine oil actuated diaphragm and servo valve system for controlling propeller pitch, with one that incorporates a separate hydraulic system utilizing hydraulic pistons. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
Replacement of the engine oil actuated diaphragm and servo valve system for controlling propeller pitch, with one that incorporates a separate hydraulic system utilizing hydraulic pistons.
SP00177SE 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: Hartzell Propeller HC-12X and Hartzell Propeller HC-12V. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
- 01Does it cover the exact Hartzell Propeller HC-12X and Hartzell Propeller HC-12V model, serial range, and configuration?
- 02Which powerplant configuration, limits, instruments, and maintenance data 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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