SA147NW
Installation of a Franklin 6AS-350-A engine, McCauley 2A34C201/90DA-12 propeller, Bendix-Stromberg PS-5C Carburetor, modified forward fuselage, single (center located) control column with electric propeller pitch control electric throttle control, and electric elevator trim, inverted fuel and oil system, retractable tail wheel assembly, aileron centering spring, modified engine baffles, engine cowl flap, modified elevator trim tab, landing gear wheel-well doors, and a modified center section wing fairing. Held by Machen INC, which holds 43 approved modifications in all. Last revised February 3, 1975. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Swift Museum Foundation Inc.
- Models
- GC-1B
- Type certificate
- A-766
- 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 21, 2026.