M International was originally formed to provide competitive alternatives for the purchase, maintenance, and overhaul of U.S. manufactured defense related equipment.

Our capabilities have evolved from a supply chain management company to key provider of US defense equipment and various aftermarket support functions to commercial & defense operations worldwide.


Mint Turbines has been serving the gas turbine MRO industry since 1981, Mint Turbines LLC specializes in aircraft turbine engines, providing engine maintenance, repair, overhaul and testing of Honeywell T53 (both commercial and military), Pratt & Whitney PT6A & PT6T Series Engines, Components, Parts & Accessories.

Established in 1991, Airborne Engines is a Transport Canada Approved Repair and Overhaul facility located in Delta, British Columbia, Canada. Airborne Engines is a Honeywell Aerospace Authorized Service Center and a valued member of the Rolls-Royce FIRST NETWORK as an Authorized Maintenance Repair and Overhaul Center (AMROC). Airborne Engines is also a member of the Joint Aviation Authority JAR 145 Repair Organization and the European Aviation Safety Agency.

With an In-House Quality Assurance Program exceeding industry standards, superior technical personnel, state of the art equipment, and an excellent long-term operational history, Airborne Engines is committed to the highest quality of workmanship, service and reliability standards, and has been accredited with ISO 9001-2008 and AS9110.

Airborne Engines’ extensive in-house reworks capabilities, enhanced by our Design Engineering Representative (DER), far exceed the services of other MRO facilities, providing a distinctive advantage within engine and component maintenance, repair and overhaul.
Building on a quarter century of heritage and experience in the helicopter industry, with a worldwide reach, our customers trust us as their key provider of service, solutions and technical knowledge to keep them Airborne.

Keystone Turbine Services, an M International company, is a full-service gas turbine engine repair and overhaul facility
located in Coatesville, PA.  Keystone is a factory-authorized Rolls-Royce M250 Authorized Maintenance, Repair and Overhaul Center (AMROC), Honeywell Authorized Warranty & Repair Station (AWARS) for M250 related accessories, as well as Turbomeca Arriel and Pratt & Whitney gas turbine engine products.

KTS has an outstanding industry reputation for the maintenance, repair and overhaul of Rolls-Royce M250 engines and Honeywell related accessory lines.  With our full data capture, certificated and correlated, all-digital test cell, KTS offers both functional and full-performance engine testing for both turboshaft and turboprop engines.  In addition we offer engine, module, accessory and component sales, exchanges, lease or rental units, spare parts sales and global field service support and training.

Our long-tenured employees average 20 years individual experience and are recognized as among the best in the industry.  They continue providing world-class service and support to our long-term devoted customers as well as welcoming new customers who operate in diverse markets such as commercial, government, off-shore, sightseeing, law enforcement and medical aviation programs.

Additionally, KTS is a member of the Rolls-Royce M250 FIRST network as a certificated Authorized Maintenance, Repair and Overhaul Center (AMROC) and Honeywell Authorized Warranty and Repair Station (AWARS).  As such, we’re fully approved and capable of supporting all M250 TotalCare® operators.