Beechcraft is now offering a factory-installed modification for King Air 250s that increases the mtow from 12,500 pounds to 13,420 pounds, providing 1,025 pounds of payload with full fuel. Aircraft with this option will be certified in the commuter category, meaning pilots will be required to have a type rating. The modification, developed with CenTex Aerospace of Waco, Texas, is also available as an aftermarket option for in-service King Air 250s via Textron Aviation’s factory-owned service centers