STC SA3961WE

Installation of extended engine mount, revised cowling and induction system, Hamilton Standard 22D40 or 12D40 constant speed propeller, and modified elevator trim tab system in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL5379, dated May 3, 1979, or later FAA approved revision. Pratt and Whitney R1340-AN-1 engine previously installed per Type Certificate A4SW is required with this installation. (Restricted Category)

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)

A4SW Ayres Corporation · S-2R

Certification basis — 14 CFR

Part 21

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 ↗