M International’s subsidiary company Southwest Fuel Systems (SWF) has announced its approval to provide full-service maintenance, repair, overhaul (MRO) and exchange services for original Triumph-manufactured hydromechanical units (HMU) certified for use on the Rolls-Royce M250-C40/C47 series of gas turbine engines.
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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 HMUs are supported by SWF:
- Rolls-Royce C40B engine for the Bell 430
- Rolls-Royce C47B engine for the Bell 407/GX/GXP
- Rolls-Royce C47B/8 for the Bell 407GXi
- Rolls-Royce C47M for the MD 600