SA3897WE
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). Held by Thrush Aircraft INC., which holds 16 approved modifications in all. Last revised July 30, 2003. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Ayres Corporation
- Models
- S-2R
- Type certificate
- A4SW
- On this site
- Ayres Corporation S-2 244 registered
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 8, 2026.