SA60RM
Installation of Sundstrand ground proximity warning system, glide slope monitoring system and Honeywell low range radio altimeter system. STC SA4-1100. Held by Frontier Airlines INC, which holds 35 approved modifications in all. Last revised May 13, 1977. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Tracor Flight Systems Inc.; Tracor Flight Systems Inc.
- Models
- 340, 440 Military C-131E
- 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.