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Flight controls

STC SA1421SO

FAA DRS lists SA1421SO as Current · Reissued, held by Mike Jones Aircraft Sales Inc., for Piper Aircraft PA-31, Piper Aircraft PA-31-300, and Piper Aircraft PA-31-325, and 2 more aircraft configurations. Recorded change: Installation of 40:1 gear ratio wing flap transmissions and related changes in accordance with Colemill Enterprises, Inc., Installation Instructions dated February 16, 1983, or later FAA approved revision. This modification provides and equivalent means of compliance with paragraphs (a)1, (a)2, and (a)4 of AD 82-27-13 and restores the 40 (full) flap travel. Snapshot dated June 30, 2026.

FAA-listed holder
Mike Jones Aircraft Sales Inc.
Aircraft configurations
5
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of 40:1 gear ratio wing flap transmissions and related changes in accordance with Colemill Enterprises, Inc., Installation Instructions dated February 16, 1983, or later FAA approved revision. This modification provides and equivalent means of compliance with paragraphs (a)1, (a)2, and (a)4 of AD 82-27-13 and restores the 40 (full) flap travel.

SA1421SO 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: Piper Aircraft PA-31, Piper Aircraft PA-31-300, and Piper Aircraft PA-31-325, and 2 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Piper Aircraft PA-31A20SOPiper Aircraft PA-31-300A20SOPiper Aircraft PA-31-325A20SOPiper Aircraft PA-31-350A20SOPiper Aircraft PA-31PA8EA

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Piper Aircraft PA-31 and Piper Aircraft PA-31-300, and 3 more aircraft configurations model, serial range, and configuration?
  2. 02Which control configuration, rigging, limitations, and inspections 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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