SA00441SE
Install vortex generators on wings. Held by Micro Aerodynamics INC, which holds 77 approved modifications in all. Last revised May 28, 1997. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Weatherly Aircraft Company; Weatherly Aircraft Company; Weatherly Aircraft Company; Weatherly Aircraft Company
- Models
- 201C, 201, 201B, 201A
- Type certificates
- A10WE, A10WE, A10WE, A10WE
- On this site
- Weatherly 201 12 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.