SA806SW
Installation of Flap close-out strips. Held by Brown Aero Corporation, which holds 9 approved modifications in all. Last revised June 1, 1967. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation
- Models
- 680FL, 680FL(P)
- Type certificates
- 2A4, 2A4
- On this site
- Aero Commander 680 51 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.