SA3238WE
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. Held by Thrush Aircraft INC., which holds 16 approved modifications in all. Last revised July 30, 2003. System: engine.
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.