SA839NW
Installation of Lycoming O-540-A1A5 engine, a Hartzell HC-A2XK/8433-2 propeller. Limited to S/N 4346. Held by Rodney Engeman, which holds 5 approved modifications in all. Last revised September 27, 1979. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Univair Aircraft Corporation
- Models
- 108-3
- Type certificate
- A-767
- 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.