SA281SW
Installation of gravity flow fuel system, carburetor heater system, and fuel selector valve in accordance with Ector Aircraft Company Drawing No. 271000 dated 9/16/1963; 72000 Rev. 2/18/1964, Ector Aircraft Drawings dated 10/16/1963 and 7/1/1963, or later FAA approved revisions and seven photographs. Or Installation of gravity flow fuel system, carburetor heater system, and fuel selector valve in accordance with Air Repair, Inc. Engineering Report AR063 dated May 12, 2009, or later FAA approved revision. Held by Steve Noyes. Last revised January 10, 2011. System: engine.
What it applies to
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 21, 2026.