SA00227AT
Installation of carbon steel brake discs that have melonite surface treatment, P/N AA-94. Held by Aviation Products, INC, which holds 64 approved modifications in all. Last revised December 7, 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
- Models
- 185, 185 Series, 180 Series, Seibel S-4A
- Type certificates
- 3A24, 3A24, 5A6, 5H2
- On this site
- Cessna 180 Skywagon 2,605 registered
Cessna 185 Skywagon 227 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 21, 2026.