Third Prototype Joins Flight Test Program
A third S-76D prototype helicopter has joined the aircraft's
certification flight test program, according to Sikorsky officials
in Florida. “D3,” the third prototype, recently flew
for the first time, officially taking its place as the program's
primary vehicle to certify the avionics and electrical systems. The
S-76D helicopter flight test program has achieved more than 500
flight hours to-date with its first two prototypes.