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Aircraft STC directory

Ayres S2R-R3S STCs

The Jun 30, 2026 FAA DRS snapshot contains 12 selected supplemental type certificates with status Current whose public applicability data names the Ayres S2R-R3S. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

12
listed Current at snapshot
5
holder directories
4
modification categories
Jun 19, 2018
latest recorded revision

Modification demand surface

Engine and powerplant6
Other aircraft modifications3
Cabin and interiors2
Propellers1

Recorded holders

Thrush Aircraft Inc.5Turbine Conversions Ltd1M-20 Oil Separators LLC1Kawak Aviation Technologies Inc1Horizon Instruments Inc1

Recently revised S2R-R3S STCs

Showing the 12 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA4038WECabin and interiors

Installation of second pilot s seat and dual controls in accordance with Serv-Aero Engineering, Inc. sealed Master Drawing List MDL 9279, dated September 2, 1979, or later FAA approved revision. Pezetel PZL-3S engine required with this installation. FAA Approved Serv-Aero Airplane Flight Manual No. 10079 dated October 29, 1979 is required with this installation. (S2R S/N 2526R AND UP MODIFIED BY STC SA3897WE) (S2R-R3S S/N R3S-001 AND UP).

FAA holder: Thrush Aircraft Inc.

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SA4045WECabin and interiors

Installation of second pilot s seat and dual controls in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 9179, dated September 1, 1979, or later FAA approved revision. Pezetel PZL-3S engine is required with this installation. FAA Approved Serv-Aero Airplane Flight Manual No. 100979 dated October 29, 1979 is required with this installation. (S2R S/N 2526R and up modified by STC SA3897WE) (S2R-R3S S/N R3S-001 AND UP NORMAL CATEGORY).

FAA holder: Thrush Aircraft Inc.

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SA4046WEEngine and powerplant

Installation of passenger/cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 10379 "A", dated November 16, 1979, or later FAA approved revision. Pezetel PZL-3S engine is required with this installation. FAA Approved Serv-Aero Airplane Flight Manual No. 101079 dated November 26, 1979 is required with this installation. (S2R S/N 2526R and up modified by STC SA3897WE) (S2R-R3S S/N R3S-001 AND UP).

FAA holder: Thrush Aircraft Inc.

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SA4047WEEngine and powerplant

Installation of passenger/cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 101179 "A", dated November 16, 1979, or later FAA approved revision. Pezetel PZL-3S engine is required with this installation. FAA Approved Serv-Aero Airplane Flight Manual No. 101079 dated November 26, 1979 is required with this installation. (S2R S/N 2526R AND UPmodified by STC SA3897WE) (S2R-R3S S/N R3S-001 AND UP, NORMAL CATEGORY).

FAA holder: Thrush Aircraft Inc.

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SA4268WEEngine and powerplant

Installation of Wright R-1820-71, -60, GR1820G-202A; 702C9GC1, 2, 3, 4; 704C9GC1, 2, 3, or 4 engines and Hamilton Standard 43D50 or 33D50 constant speed propeller or Wright R1820-97 engine and H.S. 23E50 propeller, 506 gallon fiberglass hopper, wing mounted oil cooler, and revised cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 9700 "A", dated November 24, 1980, or later FAA approved revision. FAA Approved Serv-Aero Airplane Flight Manual No. 112680, dated November 26, 1980 is required with this modification. See continuation sheets. (S2R, S/N 2526R AND UP, S2R-R3S, S/N R3S-001 AND UP).

FAA holder: Thrush Aircraft Inc.

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