SA906NW
Installation of additional Harrison oil cooler and associated systems. Held by Franklin Aircraft Engines INC., which holds 18 approved modifications in all. Last revised May 25, 2022. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Maule Aerospace Technology Inc.; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation
- Models
- M-4-220C, 108, 108-1, 108-2, 108-3
- Type certificates
- 3A23, A-767, A-767, A-767, A-767
- On this site
- Maule M-4 207 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.