SA1206SO
Installation of Pratt & Whitney PT6A-28 engines. Held by West Tennessee Aviation. Last revised April 22, 1993. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company; Raytheon Aircraft Company
- Models
- B90, C90
- Type certificates
- 3A20, 3A20
- On this site
- Beechcraft C90 King Air C90 607 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 22, 2026.