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Cabin and interiors

STC SA4-1578

FAA DRS lists SA4-1578 as Current · Reissued, held by SOUTHWESTERN AERO EXCHANGE INC., for Raytheon Aircraft D18C and Raytheon Aircraft D18S. Recorded change: Removal of the main cabin entrance door and installation of stair door. Snapshot dated June 30, 2026.

FAA-listed holder
SOUTHWESTERN AERO EXCHANGE INC.
Aircraft configurations
2
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Removal of the main cabin entrance door and installation of stair door.

SA4-1578 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: Raytheon Aircraft D18C and Raytheon Aircraft D18S. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Raytheon Aircraft D18CA-765Raytheon Aircraft D18SA-765

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Raytheon Aircraft D18C and Raytheon Aircraft D18S model, serial range, and configuration?
  2. 02Which layout, materials, flammability evidence, and weight changes 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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