SA1055GL
Removal of TC P/N 213761 or213763 propeller synchrophaser control box and electrical connector and installation of P/N A213796 control box, electrical connector, and remote switch. Held by Ontic Engineering and Manufacturing INC., which holds 59 approved modifications in all. Last revised November 23, 2004. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- British Aerospace (Scotland)
- Models
- HP Jetstream Model 3101
- 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 20, 2026.