ST01299WI-D
Installation of Dual Collins ALI-80A Altimeters and a single Revue Thommen 2-inch Standby Altimeter on Hawker Siddeley HS.125 Series 700 A/B. Data Required: (1) Midcoast Master Data List 23-334G008, Revision B, dated December 29, 2004; (2) FAA Approved Midcoast Airplane Flight Manual Supplement Report Number 23-334M006, Revision NC, dated December 29, 2004, or later FAA Approved Revisions to (1) or (2). Held by Midcoast Aviation INC, which holds 227 approved modifications in all. Last revised December 29, 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.