SA590CE
Installation of horse transportation stalls. (727-22C). Held by Interstate Airlines, INC. Last revised February 10, 1982. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 727, 172 Series, 182 Series, 180 Series
- Type certificates
- A3WE, 3A12, 3A13, 5A6
- On this site
- Boeing 727 37 registered
Cessna 172 Skyhawk 20,676 registered
Cessna 180 Skywagon 2,605 registered
Cessna 182 Skylane 11,831 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.