Main Changes
Transmission improvements allow more power to be applied to main rotor. PT6T-3D engines give higher power and 2.5 min OEI N1 and ITT limits. Improved 3 axis AP with options of 4 axis and EFIS. Torque matching no longer automatic - beeper switch now moves lateraly as well as fore and aft to match the torques in flight (can also be used to control an engine approaching it's ITT limit when hovering hot and high).