Pro Star Aviation has received approval from the Federal Aviation Administration (FAA) for an amendment to Supplemental Type Certification (STC) SR00274BO, enabling the L-3 GH-3100 ESIS to independently display magnetic heading without relying on the existing magnetic heading source, the company announced today.
The amendment also adds an Emergency Bus option for the helicopters with Rockwell Collins VHF Com and Nav equipment. The original STC, approved in July 2008, included the installation of a GH-3100 Electronic Standby Instrument System (ESIS) and optional Emergency Bus with Honeywell VHF Com and Nav equipment in the Sikorsky S-76A, S-76B and S-76C model rotorcraft.
The GH-3100 features an integrated air data sensor card with pitot and static connections directly to the unit, which eliminates the need for a remote mounted air data computer and an Active Matrix Liquid Crystal Display (AMLCD) allows for readability in direct sunlight as well as dark cockpit environments. It provides conventional electro-mechanical standby attitude, airspeed and altitude instruments, as well as slip/skid, navigation data and an optional independently magnetic heading source in a single three-inch flat-panel display. The GH-3100 replaces an existing mechanical Standby Electric Attitude Indicator and interfaces to an existing 5Ah Emergency Power Supply such as the L3 Communications Avionics Systems PS-835D or equivalent.