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Aircraft structures

STC SA7975SW-D

FAA DRS lists SA7975SW-D as Current · Reissued, held by RAM Aircraft, Limited Partnership, for Textron Aviation 335, Textron Aviation 340, and Textron Aviation 340A. Recorded change: Option 1: Install Vortex Generators on vertical stabilizer in accordance with RAM Drawing No. 1474 Rev. B. dated March 4, 1991 or later FAA approved revision. Option 2: Same as Option 1, except no change in airspeeds; Supplemental Flight Manual not required. Option 3: Install vortex generators on vertical stabilizer and wing top. Snapshot dated June 30, 2026.

FAA-listed holder
RAM Aircraft, Limited Partnership
Aircraft configurations
3
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Option 1: Install Vortex Generators on vertical stabilizer in accordance with RAM Drawing No. 1474 Rev. B. dated March 4, 1991 or later FAA approved revision. Option 2: Same as Option 1, except no change in airspeeds; Supplemental Flight Manual not required. Option 3: Install vortex generators on vertical stabilizer and wing top.

SA7975SW-D 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: Textron Aviation 335, Textron Aviation 340, and Textron Aviation 340A. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Textron Aviation 3353A25Textron Aviation 3403A25Textron Aviation 340A3A25

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Textron Aviation 335 and Textron Aviation 340, and 1 more aircraft configuration model, serial range, and configuration?
  2. 02Which configuration, loads, materials, inspections, and damage limits 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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