SA2230SO
Installation of stainless steel brake discs P/N 75-20. Held by Aviation Products, INC, which holds 64 approved modifications in all. Last revised February 6, 1995. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Booth Lee F. dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace
- Models
- F21A, F21
- Type certificates
- 1A9, 1A9
- On this site
- Taylorcraft F21 13 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.