The S-76C++ is the final variant of Sikorsky's highly regarded S-76 twin turbine helicopter before introduction of the S-76D. It is a further improved version of the S-76C+ with new Turbomeca Arriel 2S2 engines, a new gearbox, higher takeoff weight, the Honeywell VXP usage monitoring system (HUMS), larger cabin windows and EGPWS and TCAS systems. More @Wikipedia
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