STC for performance boost to Bell 407

Bell Helicopters has announced that it has received a STC (Supplemental Type Certificate) to increase the hot and high performance of the Bell 407.

The STC draws on excess power available from the 407’s Rolls-Royce 250-C47B engine to support revisions of the 407’s performance charts for in-ground-effect and out-of-ground-effect hover. Specifically, it uses available power for up to 10 percent above minimum-specification engines for outside air temperatures up to 51.7 degrees C. The performance boost requires no hardware or software changes to the aircraft or its engine nor any change to time between overhaul or warranty costs because no engine limits are changed.