SA4267WEOther aircraft modifications
Installation of modified horizontal stabilizer.
FAA holder: Randy Goering Inc.
Aircraft STC directory
Ayres S2R 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. 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
2
modification categories
May 16, 2023
latest recorded revision
Modification demand surface
Other aircraft modifications9
Engine and powerplant3
Recently revised S2R STCs
Showing the 12 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA903GLEngine and powerplant
Installation of a spin-off filter assembly in the engine scavenge oil system.
FAA holder: Airwolf Filter Corp
SA00034SEOther aircraft modifications
Installation of AG-Air Systems, Inc., chemical disbursement system. (S2R modified per STC SA5953NM and S2R-G10 modified per STC SA00172SE).
FAA holder: Kawak Aviation Technologies Inc
SA1008WEOther aircraft modifications
Installation of Poly-Fiber covering material.
FAA holder: Poly-Fiber Inc.
SA1095GLOther aircraft modifications
Surrendered and incorporated into STC SA00478CH.
FAA holder: Cooper Aviation Supply Company, Inc.
SA1096GLOther aircraft modifications
Surrendered and incorporated into STC SA00478CH.
FAA holder: Cooper Aviation Supply Company, Inc.
SA1286GLOther aircraft modifications
Surrendered and incorporated into STC SA241CH.
FAA holder: Cooper Aviation Supply Company, Inc.
SA1287GLOther aircraft modifications
Surrendered and incorporated into STC SA241CH.
FAA holder: Cooper Aviation Supply Company, Inc.
SA00622LAEngine and powerplant
Installation of an electronic digital engine tachometer horizon model P-1000.
FAA holder: Horizon Instruments Inc
SA2440WEOther aircraft modifications
Installation of automatic flagman Model No. 4.
FAA holder: R-S Sales Inc.
SA02133ATEngine and powerplant
Replacement of a Pratt & Whitney R-1340 engine with a Walter M601E-11 engine and Avia-Hamilton Standard VJ8.510 or VJ8.510AG propeller.
FAA holder: Turbine Design, Inc.
SA00962LAOther aircraft modifications
Installation of Weath-Aero FE300 cockpit controllable spray pump fan system.
FAA holder: Weath-Aero Co., Inc.