SA1199NW
Installation of a Hartzell HC-C2YF-1BF/F8459A-4 to -8, Hartzell 82A4203 spinner, and associated systems on a Franklin 6A-350-C1 engine. Held by Franklin Aircraft Engines INC., which holds 18 approved modifications in all. Last revised May 25, 2022. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.
- Models
- Bee Dee M-4-220T, Bee Dee M-4-220S, Bee Dee M-4-220C
- Type certificates
- 3A23, 3A23, 3A23
- 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.