Maintenance and Modifications
Blackhawk Submits Data for Latest King Air STC
The upgrade package on the King Air 350 promises more power and better perfomance
Blackhawk's King Air 350 test aircraft
The Blackhawk Group is awaiting FAA STC approval for its latest modification to the Beechcraft King Air 350.

Aircraft modification specialist Blackhawk Group has completed the application process for supplemental type certificate (STC) approval for its integration of the Hartzell advanced five-blade composite propeller with Blackhawk’s XP67A Engine+ upgrade on the Beechcraft King Air 350. The company said today at EAA Airventure that it has submitted all flight test data—derived through the installation of the package on its testbed King Air—to the FAA for validation.

According to Blackhawk, the upgrade provides a 24% increase in available horsepower (1,200 she), with improved performance including cruise speeds of more than 337 knots and climb to FL350 in less than 18 minutes.