SA4-145
Removal of C-125, Continental Engine and installation of C145, Continental Engine and Koppers Model F200 and F200-H propellers with 0073-E blades in all model GC-1B Swifts. Maximum engine power restricted to 125 hp at 2550 rpm and 25.8 in. Hg. MAP. Installation must be made per Preston Johnson Drawing No. PDJ-3. Held by Skybound Manufacturing INC., which holds 19 approved modifications in all. Last revised June 25, 2003. 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 7, 2026.