SA00199AT
Installation of carbon steel brake discs that have melonite surface treatment, P/N AA-25A. Held by Aviation Products, INC, which holds 64 approved modifications in all. Last revised November 14, 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
- Models
- 337A (USAF 02B), 337B, T337B, 337C, 337E, 337D, M337B (USAF 02A), 337
- Type certificates
- A6CE, A6CE, A6CE, A6CE, A6CE, A6CE, A6CE, A6CE
- On this site
- Cessna 337 Skymaster 370 registered
Cessna M337 34 registered
Cessna T337 193 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.