The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · reissued

SA00214AT

Installation of carbon steel brake discs that have melonite surface treatment, P/N AA-89. Held by Aviation Products, INC, which holds 64 approved modifications in all. Last revised November 17, 1994. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
Models
A185F, A185E, 185E, 185D, 185C, 185B, 185A, 185, 180F, 180G, 180H, 180J, 180K, 180E, 180, 180D, 180C, 180A, 180B, TU206B, TU206A, TU206C, TU206D, TU206E, U206, TU206F, TU206G
Type certificates
3A24, 3A24, 3A24, 3A24, 3A24, 3A24, 3A24, 3A24, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, A4CE, A4CE, A4CE, A4CE, A4CE, A4CE, A4CE, A4CE
On this site
Cessna 180 Skywagon 2,605 registered
Cessna 185 Skywagon 227 registered
Cessna A185 Skywagon 1,372 registered
Cessna TU206 344 registered
Cessna U206 Stationair 798 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 19, 2026.