SE5924SW

Installation of stainless steel replacement exhaust studs on AVCO engines. Held by Perrigo & Steele Aircraft Engr Company. Last revised April 24, 1985. System: engine.

What it applies to

Kind of product: Engine
Design holder: Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation; Textron Lycoming AVCO Corporation
Models: IO-360 Series, IGO-540 Series, IO-320 Series, TVO-435 Series, TIVO-540 Series, IO-720 Series, IO-540 Series, IGSO-540 Series, O-235 Series, GO-435 Series, O-290 Series, O-320 Series, GO-480 Series, VO-435 Series, GSO-480 Series, O-360 Series, O-540 Series, VO-540 Series, IVO-540 Series, TO-360 Series
Type certificates: 1E10, 1E11, 1E12, 1E13, 1E14, 1E15, 1E4, 1E7, E-223, E-228, E-229, E-274, E-275, E-279, E-284, E-286, E-295, E-304, E11EA, E26EA
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 21, 2026.