Skip to content

Atlas / STC / SA3238WE

FAA · Supplemental Type Certificate

STC 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.

Current Reissued Aircraft Single-Engine Rev 07/30/2003 View PDF on drs.faa.gov ↗

What is an STC?

A Supplemental Type Certificate authorizes a major modification or alteration to an FAA-certificated aircraft. STCs are how operators legally install new avionics, change fuel systems, add floats, swap engines, etc. — every change beyond a minor modification needs one.

Applicable aircraft (1)

Certification basis — 14 CFR

Specific sections

  • Sec. 111
  • Sec. 113
  • Sec. 115
  • Sec. 117
  • Sec. 119
  • Sec. 120

The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗