SE01288WI
Modification of Engines to replace carburetor with fuel injection. Data required: (1) Butterfly Aviation Master Drawing List Report BA1001-11, dated October 28, 2004, and (2) Butterfly Aviation Instructions for Continued Airworthiness Report BA1001-8, dated October 26, 2004, or later FAA Approved revisions to (1) or (2). Held by Radial Engines LTD, which holds 5 approved modifications in all. Last revised November 23, 2004. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Jacobs Service Company; Jacobs Service Company; Jacobs Service Company; Jacobs Service Company
- Models
- R-755A2, R-755A2M, R-755B2, R-755B2M
- Type certificates
- E-237, E-237, E-237, E-237
- 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 5, 2026.