STC SA903GL
FAA DRS lists SA903GL as Current · Reissued, held by Airwolf Filter Corp, for Ayres S2R. Recorded change: Installation of a spin-off filter assembly in the engine scavenge oil system. Snapshot dated June 30, 2026.
FAA-listed holder
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued
Recorded modification
What the FAA record covers
SA903GL 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 S2R. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Related engine and powerplant STCs
Installation of cooling louvers on top of both (L.H. and R.H.) nacelle accessory sections.
FAA holder: Sierra Industries Inc
Installation of Hartzell HC-C3YF-1RF/F9587C-17S propeller on Continental IO-520-D engine.
FAA holder: Sierra Industries Inc
Installation of engine thrust reversers.
FAA holder: Sierra Industries Ltd.
FAA record reference
- STC number
- SA903GL
- Product
- Aircraft · Single-Engine
- Country
- United States
- Application date
- May 28, 1985
- Revision date
- May 1, 2018
- CFR references
- Part 21