STC SA4-577
FAA DRS lists SA4-577 as Current · Reissued, held by United Airlines Inc, for Boeing DC-6. Recorded change: Aileron trim control gearing modification. Snapshot dated June 30, 2026.
FAA-listed holder
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued
Recorded modification
What the FAA record covers
Aileron trim control gearing modification.
SA4-577 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: Boeing DC-6. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
- 01Does it cover the exact Boeing DC-6 model, serial range, and configuration?
- 02Which control configuration, rigging, limitations, 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?
Related flight controls STCs
SA01405WIFlight controls
Installation of the Garmin GFC 700 Automatic Flight Control System and TAWS Option.
FAA holder: Mooney Airplane Company Inc.
SA2-1016Flight controls
Recertification under subparts B &G of CAR 3 and installation of SA4-120 airspeed system, SA4-21, fuel system, and SA-2-523, stabilizer angle of incidence change and elevator seal strips.
FAA holder: Staggerwing Museum Foundation Inc.