SA02057SE
Modification of aircraft and installation of Jacobs L-6MB engine, a Hamilton Standard 2B-20-9 propeller, a Cessna 195 engine ring mounted on a WACO ATO engine mount, and associated accessories and hardware on WACO ATO, serial number A-81. Held by Richard Melhoff. Last revised March 16, 2010. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Waco Aircraft Company
- Models
- ATO
- Type certificate
- ATC 123
- On this site
- Waco ATO 27 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 7, 2026.