M International’s subsidiary company Southwest Fuel Systems (SWF) is pleased to announce its approval to provide full-service maintenance, repair, overhaul and exchange (MRO) services for original Triumph manufactured Hydromechanical Units (HMU) certified for use on the Rolls-Royce M250-C40/C47 series of gas turbine engines.

Ralph Bishop, President of Southwest Fuels stated, “As a Triumph Authorized Engine and Control Maintenance Center for HMU’s, our goal is to provide faster turnaround for overhaul and exchange HMU’s along with a better price. This industry was ripe for a new support team, and Southwest Fuels accepts this challenge – let us address your next HMU need.”

The M250-C40/C47 Series engine incorporates a Full Authority Digital Electronic Fuel Control (FADEC) system which provides complete automatic control of the engine including temperature and speed limiting. The FADEC system has two main components – one Electronic Control Unit (ECU) and one Hydromechanical Unit (HMU). The HMU is engine mounted and driven by the N1 gear train and includes a fuel metering unit and both a boost stage (high performance liquid ring) fuel pump and a main fuel pump (gear stage). The following HMU’s are supported by SWF:

For further information, or to schedule servicing or exchange of your HMU, please contact the following: