SA3746NM
Installation of a dual Universal Navigation Corp. (UNC) UNS-1 flight management system with inputs from Omega/VLF, DME, VOR, and air data sensors. Held by Gates Learjet CORP, which holds 2 approved modifications in all. Last revised November 6, 1987. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.
- Models
- Learjet 55B
- Type certificate
- A10CE
- 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.