SA01301WI
Installation of Jacobs R-755B2 or R-755B2M engine modified for fuel injection in accordance with STC SE01288WI, J.P. Instruments Fuel Flow meter in accordance with STC SA00432SE, and electric fuel boost pump. Data required: (1) Radial Engines Master Drawing List Report REL1003-13, Revision (IR), dated October 4, 2004, (2) Radial Engines Limited Instruction for Continued Airworthiness Report REL1003-12, Revision (IR), dated October 4, 2004, and (3) FAA Approved Airplane Flight Manual Supplement REL1003-5, Revision (IR), dated January 21, 2005 or later FAA Approved revisions to (1), (2), or (3). Held by Radial Engines LTD, which holds 5 approved modifications in all. Last revised January 27, 2005. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Waco Aircraft Company
- Models
- YMF
- Type certificate
- ATC 542
- On this site
- Waco Classic Aircraft Corp YMF 6 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 5, 2026.