SA3205SO

Installation of Appalachian stainless steel brake discs. Held by Aviation Products, INC, which holds 64 approved modifications in all. Last revised September 29, 1995. System: landing gear.

What it applies to

Kind of product: Aircraft
Design holder: Alliance Aircraft Group LLC; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; STOL Aircraft Corporation
Models: H-295 (USAF U-10D), 210-5 (205), 210-5A (205A), 185 Series, 180 Series, 336, 206 Series, Bee Dee M-6-235, Bee Dee M-5-235C, Colonial C-2, Colonial Lake Model 250, Lake LA-4P, Lake LA-4A, Lake LA-4, Colonial C-1, Lake LA-4-200, UC-1 (Twin-Bee)
Type certificates: 1A8, 3A21, 3A21, 3A24, 5A6, A2CE, A4CE, 3A23, 3A23, 1A13, 1A13, 1A13, 1A13, 1A13, 1A13, 1A13, A6EA
On this site: Cessna 180 Skywagon 2,605 registered
Cessna 185 Skywagon 227 registered
Cessna 206 Stationair 213 registered
Cessna 210 Centurion 1,528 registered
Cessna 336 35 registered
Consolidated Aeronautics Inc. LAKE LA-4 15 registered
Consolidated Aeronautics Inc. LAKE LA-4-200 139 registered
Helio H-295 54 registered
Stol UC-1 8 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 20, 2026.