ST01231CH-D
Installation of a Collins FCS-80 flight director system installed as a second system for use by copilot. Held by Electrosonics, which holds 76 approved modifications in all. Last revised December 10, 2001. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company; Raytheon Aircraft Company
- Models
- DH.125 Series 1A-522, DH.125 Series 1A
- Type certificates
- A3EU, A3EU
- 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 7, 2026.