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Engine and powerplant

STC SA1921SW

FAA DRS lists SA1921SW as Current · Amended, held by Wall Colmonoy Corp, for Textron Aviation 172, Textron Aviation 172A, and Textron Aviation 172B, and 18 more aircraft configurations. Recorded change: Installation of Exhaust System Muffler Assembly. Snapshot dated June 30, 2026.

FAA-listed holder
Wall Colmonoy Corp
Aircraft configurations
21
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

Installation of Exhaust System Muffler Assembly.

SA1921SW 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 172, Textron Aviation 172A, and Textron Aviation 172B, and 18 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Textron Aviation 1723A12Textron Aviation 172A3A12Textron Aviation 172B3A12Textron Aviation 172C3A12Textron Aviation 172D3A12Textron Aviation 172E3A12Textron Aviation 172F (USAF T-41A)3A12Textron Aviation 172G3A12Textron Aviation 172H (USAF T-41A)3A12Textron Aviation 172I3A12Textron Aviation 172K3A12Textron Aviation 172L3A12Textron Aviation 172M3A12Textron Aviation 172N3A12Textron Aviation 172P3A12Textron Aviation 172Q3A12Textron Aviation 172R3A12Textron Aviation 172S3A12Textron Aviation 177A13CETextron Aviation 177AA13CETextron Aviation 177BA13CE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Textron Aviation 172 and Textron Aviation 172A, and 19 more aircraft configurations model, serial range, and configuration?
  2. 02Which powerplant configuration, limits, instruments, and maintenance data 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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