Skip to content
Engine and powerplant

STC SA3961WE

FAA DRS lists SA3961WE as Current · Reissued, held by Thrush Aircraft Inc., for Ayres S-2R. Recorded change: Installation of extended engine mount, revised cowling and induction system, Hamilton Standard 22D40 or 12D40 constant speed propeller, and modified elevator trim tab system in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL5379, dated May 3, 1979, or later FAA approved revision. Pratt and Whitney R1340-AN-1 engine previously installed per Type Certificate A4SW is required with this installation. (Restricted Category). Snapshot dated June 30, 2026.

FAA-listed holder
Thrush Aircraft Inc.
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of extended engine mount, revised cowling and induction system, Hamilton Standard 22D40 or 12D40 constant speed propeller, and modified elevator trim tab system in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL5379, dated May 3, 1979, or later FAA approved revision. Pratt and Whitney R1340-AN-1 engine previously installed per Type Certificate A4SW is required with this installation. (Restricted Category).

SA3961WE 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: Ayres S-2R. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Ayres S-2RA4SW

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Ayres S-2R 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?

Related engine and powerplant STCs