SR00666AT
Installation of a LITEF dual LCR-92S attitude heading reference system (AHRS). Held by Sikorsky Aircraft, which holds 147 approved modifications in all. Last revised April 30, 1997. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation
- Models
- S-76B, S-76C, S-76A
- Type certificates
- H1NE, H1NE, H1NE
- On this site
- Sikorsky Aircraft Corp S-76 34 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 7, 2026.