Southwest Fuel Systems is pleased to announce their 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-C40B/C47B series of gas turbine engines.
The M250-C40B/C47B series engines incorporate 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 – an Electronic Control Unit (ECU) and a Hydromechanical Unit (HMU).
The HMU is engine mounted and driven by the N1 gear train and includes a fuel metering unit and one boost stage (high performance liquid ring) fuel pump and one main fuel pump (gear stage). The following HMU’s are supported by SWF:
| ROLLS-ROYCE PART NUMBER | TRIUMPH PART NUMBER |
|---|---|
| 23057878/23057879 | 113200-01A1 |
| 23064100 | 113200-01A2 |
| 23057880 | 113200-02A2 |
| 23057883 | 113200-02C2 |
| 23068653 | 113200-02C3 |
| 23069550 | 113200-02C4 |
| 23072207 | 113200-03C4 |
| 23072732 | 113200-03C6 |
| 23075392 | 113200-04A1 |
| 23078033 | 113200-04A5 |
| M250-10152 | 113200-04B5 |
| 23072726 | 113200-03C5 |
| 23075496 | 113200-03C7 |
| 23078035 | 113200-03C10 |
| 23078056 | 113200-03C8 |
| 23067961 | 114070-01A1 |
| 23068651 | 114070-01A |
| 23069251 | 114070-01A3 |
| 23069551 | 114070-01A4 |
| 23070726 | 114375-01A1 |
| 23072208 | 114070-03A4 |
| 23072731 | 114070-03A6 |
| 23075390 | 114070-04A1 |
| 23078029 | 114070-04A5 |
| M250-10151 | 114070-04B5 |
| M250-10239 | 114070-04B6 |
| M250-10136 | 114070-04A6 |
| 23072725 | 114070-03A5 |
| 23078029 | 114070-04A4 |
| 23078030 | 114070-03A10 |
| 23078031 | 114070-03A12 |
| 23078032 | 114070-03A9 |
| 23078033 | 113200-04A4 |
