We provide total life-cycle support for your PT6 engine accessory gearbox, including couplings, shafts, gears, and sealing components. The accessory gearbox drives critical engine systems — fuel control, oil pump, starter-generator — making component reliability essential. EXTEX accessory gearbox parts are precision-ground and inspected to ensure consistent performance, with strategic inventory levels maintained for rapid fulfillment.
EXTEX provides a comprehensive offering of flight critical certified replacement parts for the PT6 power turbine section, including seal rings, rotor air seals, blades, interstage stator and rotor seals, and couplings. Our PT6 turbine blades feature advanced sulfidation-resistant coatings that extend time on wing — a critical advantage for operators in corrosive environments. Every power turbine component undergoes rigorous dimensional inspection and metallurgical verification before shipping.
The reduction gearbox is one of the highest-cost assemblies in PT6 engine maintenance. EXTEX manufactures FAA-approved sun and planet gears, bushing kits, and propeller shaft seals — high-precision aerospace machined components that add efficiency and reliability while significantly reducing your aircraft MRO parts costs. Our reduction gearbox components are engineered for extended service life, helping operators stretch intervals between overhauls.
EXTEX Engineered Products provides FAA-approved aerospace aftermarket parts for the complete PT6 engine family, including the PT6A-6, 6A, 6B, 6/C20, 20, 20A, 20B, 21, 25, 25A, 27, 28, 34, 34AG, 34B, 36, 38, 41AG, 41, 42, 62, 135, and 135A, to name just a few. Every component carries Parts Manufacturer Approval (PMA) and is manufactured to meet or exceed original equipment specifications, delivering reliable aircraft engine replacement parts at a lower total cost of ownership.
Our compressor turbine section components include shroud segments, seal rings, CT blades, stub shafts, and associated hardware. These parts operate in the highest-temperature zone of the PT6 engine, demanding the most exacting manufacturing standards. EXTEX compressor turbine parts are produced from certified aerospace-grade alloys and machined to tight tolerances, ensuring reliable performance across the full operating envelope.