ST01124WI
Installation of a Collins Dual ADC-87A Air Data Computer System and certification of the capability of operation in Reduced Vertical Separation Minimum (RVSM) airspace. Held by Midcoast Aviation INC, which holds 227 approved modifications in all. Last revised December 8, 2004. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company; Raytheon Aircraft Company
- Models
- HS.125 Series 700A, HS.125 Series 700B
- Type certificates
- A3EU, A3EU
- On this site
- Hawker Siddeley HS.125 SERIES 700A 7 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 8, 2026.