ST02538LA
Replacement of Pratt and Whitney JT15D-5 series engines with Williams International FJ44-4A-32 engines with Full Authority Digital Electronic Control (FADEC) and associated systems. Held by Textron Aviation INC, which holds 723 approved modifications in all. Last revised April 30, 2019. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Textron Aviation Inc.
- Models
- 400A
- Type certificate
- A16SW
- 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.