SA340SO
Replacing Continental IO 470 M Engines with Continental IO 520 E engines rated at 300hp for takeoff 285hp continuous, and the installation of Hartzell 3 bladed propellers. EHC A3VF-2B/7636D. Held by Mike Jones Avionics & Maintenance. Last revised December 28, 2010. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Twin Commander Aircraft Corporation
- Models
- 500 Series
- Type certificate
- 6A1
- 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 20, 2026.