SA2076WE
Installation of Collins AP-104/ FD-109 autopilot - flight director system. Held by Collins Radio Company, which holds 51 approved modifications in all. Last revised April 21, 1970. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- British Aerospace (Scotland)
- Models
- HP 137 Jetstream Mk. 1
- Type certificate
- A21EU
- 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 21, 2026.