The Blackhawk Group and Hartzell Propeller secure FAA STC approval for 5-blade composite propeller paired with XP67A Engine+ Upgrade for King Air 350 operators
PRESS RELEASE
The Blackhawk Group has officially received FAA Supplemental Type Certificate approval for the integration of Hartzell Propeller’s advanced 5-blade composite propeller with Blackhawk’s XP67A Engine+ Upgrade on the King Air 350.
This certification unlocks a fully approved performance package that delivers major gains in speed, efficiency, and operational value, reinforcing Blackhawk’s leadership in upgrading legacy turboprops.
Hartzell’s 5-blade composite propeller features carbon fiber construction that replaces the standard 4-blade aluminum prop, reducing weight by approximately 10 pounds per side. The smaller diameter lowers cabin and exterior noise while improving comfort and efficiency.
Paired with the XP67A Engine+ Upgrade, which replaces stock PT6A-60A engines with 1200 SHP PT6A-67A powerplants, the approved package delivers a 24 percent increase in available horsepower. Operators can expect cruise speeds above 337 KTAS, climbs to FL350 in under 18 minutes, and significantly better takeoff performance.
The XP67A has proven exceptional reliability for more than 8 years across demanding environments. With this new STC, Blackhawk expands upgrade options for King Air 350 owners, delivering long-term performance and value.
“This STC approval is a major step forward for King Air 350 operators looking to elevate performance without buying a new airframe,” said Edwin Black, President of TBG’s Proprietary Upgrades division. “By pairing Hartzell’s composite propeller with our XP67A upgrade, we are delivering a powerful, efficient solution with strong ROI.”
Hartzell’s composite propeller has more than 50,000 flight test hours, 20 lightning strike simulations, and over 200 bird strike tests. With unlimited blade life and reduced maintenance, operators gain improved fuel efficiency and increased uptime.
“We are excited to launch this 5-blade carbon fiber propeller STC for Blackhawk-powered King Air 350s,” said JJ Frigge, President of Hartzell Propeller. “It is lighter, quieter, and engineered for maximum thrust, making it the ideal match for the XP67A.”
With FAA approval secured, Blackhawk now offers a certified, customizable upgrade path for King Air 350 owners seeking jet-like performance at turboprop operating cost. Blackhawk-modified King Airs consistently sell at or above the combined value of the airframe and upgrades, strengthening long-term investment potential.