Aircraft STC directory

Ayres S-2R STCs

The Jun 30, 2026 FAA DRS snapshot contains 19 selected supplemental type certificates with status Current whose public applicability data names the Ayres S-2R. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

19

listed Current at snapshot

3

holder directories

4

modification categories

Jun 19, 2018

latest recorded revision

Modification demand surface

Engine and powerplant11

Cabin and interiors6

Propellers1

Other aircraft modifications1

Recorded holders

Thrush Aircraft Inc.15 Turbine Conversions Ltd1 M-20 Oil Separators LLC1

Recently revised S-2R STCs

Showing the 19 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA00902CHEngine and powerplantRevised Jun 19, 2018

Installation of Walter a.s. turboprop engine model M601D-11 or M601E-11 with Avia Propeller Ltd. model V510, V510AG, V508E-AG/99A or V508E-AG/106A in accordance with Turbine Conversions Ltd. Drawing List, Report WAL2000, Revision A, dated March 4, 2005, or later approved revision.

FAA holder: Turbine Conversions Ltd

SA00172SEPropellersRevised Dec 3, 2013

Installation of the following Garrett engines: TPE331-1-151A, -151K, -151G; TPE331-2-201A, -201C, or TPE331-6-252M, -252B, -252T, in combination with a Hartzell HC-B3TN-5(M)/T10282+4 propeller.

FAA holder: Valley Air Service Inc

SA02033AT (PAGE 6)Engine and powerplantRevised Jul 24, 2008

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).

FAA holder: M-20 Oil Separators LLC

SA01639NYOther aircraft modificationsRevised Jun 1, 2004

Replacement of 12 refrigerant in air conditioning system with Enviro Refrigerant Hotshot R414B.

FAA holder: Scale Modelbuilders Inc.

SA3237WEEngine and powerplantRevised Jul 30, 2003

Installation of a United Aircraft of Canada PT6A-27 or PT6A-34 engine in accordance with Serv-Aero Engineering, Inc. Drawing List 537761, revision dated July 15, 1976, or later FAA Sealed revisions. FAA approved Serv-Aero Engineering, Inc. Airplane Flight Manual dated November 30, 1976, or later FAA approved revisions, is required as part of this installation for the PT6A-27 engine. FAA approved Serv-Aero Engineering, Inc. Airplane Flight Manual dated July 23, 1976, or later FAA approved revisions, is required as part of this installation for the PT6A-34 engine. Aircraft incorporating the PT6A-34AG engine and engines converted to the PT6A-34AG configuration per Ayres Corporation Service Bulletin 001 dated August 25, 1977, or later FAA approved revisions, require Ayres Corporation Airplane Flight Manual (AFM) dated August 29, 1977, or later approved revisions. This AFM replaces the Serv-Aero Engineering, Inc. AFM and basic S-2R AFM.

FAA holder: Thrush Aircraft Inc.

SA3238WEEngine and powerplantRevised Jul 30, 2003

Installation of a United Aircraft of Canada PT6A-27 or PT6A-34 engine in accordance with Serv-Aero Engineering, Inc. Drawing List 527761, revision dated July 15, 1976, or later FAA Sealed revisions. FAA approved Serv-Aero Engineering, Inc. Airplane Flight Manual dated November 30, 1976, or later FAA approved revisions, is required as part of this installation for the PT6A-27 engine. FAA approved Serv-Aero Engineering, Inc. Airplane Flight Manual dated July 23, 1976, or later FAA approved revisions, is required as part of this installation for the PT6A-34 engine. Aircraft incorporating the PT6A-34AG engine and engines converted to the PT6A-34AG configuration per Ayres Corporation Service Bulletin 001 dated August 25, 1977, or later FAA approved revisions, require Ayres Corporation Airplane Flight Manual (AFM) dated August 29, 1977, or later approved revision, and Ayres Corporation AFM Supplement for Restricted Category Operation dated August 29, 1977, or later approved revision. This AFM and supplement replace the Serv-Aero Engineering, Inc. AFM and basic S-2R AFM.

FAA holder: Thrush Aircraft Inc.

SA3767WEEngine and powerplantRevised Jul 30, 2003

Installation of 500 gallon fiberglass hopper and relocated oil cooler in accordance with FAA sealed Serv-Aero Engineering, Inc. Master Drawing List No. MDL 83178, dated October 26, 1978, or later FAA approved revision. P & W PT6A-34 engine installed per STC SA3238WE and FAA approved Serv-Aero Airplane Flight Manual dated October 26, 1978, are required with this installation. (S2R RESTRICTED CATEGORY).

FAA holder: Thrush Aircraft Inc.

SA3842WEEngine and powerplantRevised Jul 30, 2003

Installation of 500 gallon fiberglass hopper and relocated oil cooler and deletion of the alternate air inlet doors in accordance with FAA sealed Serv-Aero Engineering, Inc. Master Drawing List No. MDL 83178, dated October 26, 1978, or later FAA approved revision. P & W PT6A-34 engine installed per STC SA3237WE and FAA approved Serv-Aero Airplane Flight Manual Supplement dated January 25, 1979, are required with this installation. (S2R NORMAL CATEGORY).

FAA holder: Thrush Aircraft Inc.

SA3897WEEngine and powerplantRevised Jul 30, 2003

Installation of Pezetel Model PZL-3S engine and Dowty Rotel Model CR289/3-110-F/1 propeller in accordance with Serv-Aero Engineering, Inc. Installation Procedure No. 32679, dated March 26, 1979. Parts manufactured in accordance with FAA sealed Serv-Aero Master Drawing List No. MDL-9500, dated March 26, 1979, or later FAA approved revision. (S2R RESTRICTED CATEGORY).

FAA holder: Thrush Aircraft Inc.

SA3961WEEngine and powerplantRevised Jul 30, 2003

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).

FAA holder: Thrush Aircraft Inc.

SA4038WECabin and interiorsRevised Jul 30, 2003

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.

SA4045WECabin and interiorsRevised Jul 30, 2003

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.

SA4046WEEngine and powerplantRevised Jul 30, 2003

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.

SA4047WEEngine and powerplantRevised Jul 30, 2003

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.

SA4107WECabin and interiorsRevised Jul 30, 2003

Installation of second pilot s seat and dual controls or passenger/cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 020180, dated February 1, 1980, or later FAA approved revision. UACL PT6A-34A engine is required with this installation. FAA Approved Serv-Aero Airplane Flight Manual No. 022280 dated March 17, 1980 is required with this installation. (S2R S/N 2526R AND UP MODIFIED BY STC SA3238WE) (S2R-T34 S/N 6009-6049, S/N T34-001 AND UP).

FAA holder: Thrush Aircraft Inc.

SA4108WECabin and interiorsRevised Jul 30, 2003

Installation of second pilot s seat and dual controls or passenger/cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 020280, dated February 2, 1980, or later FAA approved revision. UACL PT6A-34A engine is required with this installation. FAA Approved Serv-Aero Airplane Flight Manual No. 022280 dated March 17, 1980 is required with this installation. (S2R S/N 2526R AND UP MODIFIED BY STC SA3237WE) (S2R-T34 S/N 6009-6049, S/N T34-001 AND UP).

FAA holder: Thrush Aircraft Inc.

SA4112WECabin and interiorsRevised Jul 30, 2003

Installation of second pilot s seat and dual controls or passenger/cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 012880 "A", dated April 21, 1980, or later FAA approved revision. P&W R-1340-AN-1 engine is required with this installation. FAA Approved Serv-Aero Airplane Flight Manual Nermission. Supplemental Type Certificate Addendum No. SA4112WE is a part of this STC. (S2R s/n 2526R and up modified by STC SA3961WE).

FAA holder: Thrush Aircraft Inc.

SA4113WECabin and interiorsRevised Jul 30, 2003

Installation of second pilot s seat and dual controls or passenger/cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 012980 "A", dated April 21, 1980, or later FAA approved revision. P&W R-1340-AN-1 engine is required with this installation. FAA Approved Serv-Aero Airplane Flight Manual No. 012880 dated April 22, 1980 is required with this installation. (S2R S/N 2526R AND UP MODIFIED BY STC SA3961WE).

FAA holder: Thrush Aircraft Inc.

SA4268WEEngine and powerplantRevised Jul 30, 2003

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.