SA3283SO
Installation of KNS 660 Flight Management system and KLN 670 Global positioning system with Honeywell Laseref II inertial reference system w/ STC SA4-1100 installed. Held by Superior Avionics, which holds 6 approved modifications in all. Last revised July 2, 1993. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Tracor Flight Systems Inc.; Tracor Flight Systems Inc.
- Models
- 440 Military C-131E, 340
- Type certificates
- 6A6, 6A6
- 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.