SH1073NE
Addition of global positioning system sensor, Model GPS 950, to existing multi-sensor Universal Navigation system UNS-1A long range navigation system. Held by Keystone Helicopter CORP, which holds 8 approved modifications in all. Last revised March 25, 1993. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation
- Models
- S-76B, S-76C
- Type certificates
- H1NE, H1NE
- On this site
- Sikorsky S-76 141 registered
- 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 22, 2026.