Maintenance and Modifications
StandardAero Highlights HMU for Cooler Helicopter Starts
MRO provider also announces expansion of its engine rental pool following new agreement with Rolls-Royce.

MRO provider StandardAero is showcasing here at Heli-Expo a custom-overhauled hydromechanical unit (HMU) for operators of Rolls-Royce M250-C47 engines that lowers starting temperatures in warm conditions. The HMU was designed as part of StandardAero’s continuous improvement efforts on the M250-C47 engine.

Manny Atwal, vice president of StandardAero Helicopters, noted that some M250 Series IV Fadec engines flown in hot/high conditions experience elevated starting temperatures, leading operators to resort to alternate starting procedures. The custom-overhauled HMU solution, now in use on more than 20 helicopters, confirms start-temperature reductions of more than 120 deg C on several HMUs with a history of warm-starting problems, according to data provided by operators.