ENGINES
HMM – What is the typical time between overhaul (TBO) on the engine? PT – It depends on the model and the series. On the Series
2 engines, the gearbox is on condition, and the turbine and compressor are both rated at 3,500 hours. Series 4 engines have a compressor that is rated on condition. The impeller on a Series 4 engine has diff erent life limits depending on the model. The gearbox is on condition, and the turbine is rated at 2,000 hours TBO on all models except the C40 engine.
Rolls Royce M250 Turboshaft Engine, Courtesy of Rolls Royce
For more than 40 years, Premier Turbines has been a leading provider of repair and overhaul services for business, general aviation, government and military turbine engines, components and accessories. They are also a world-leading authorized maintenance center (AMROC) for Rolls-Royce M250 engines and a member of the M250 FIRST network. HMM – Before we get into the details of this article,
how about starting us off with some general background information? PT – The Rolls-Royce 250/T63 Turboshaft Engine
was originally designed in June 1958 to meet military requirements for a 250 shp engine for light observation aircraft. Out of that program, several helicopter manufacturers were asked to look into the feasibility of adapting this engine for helicopter use. From this beginning, the M250 engine grew to where it is today. The fi rst test fl ight in a helicopter was in February 1961. Since its inception, the M250 engine has logged more than 200 million fl ight hours. Over 30,000 engines have been delivered to date, and there are about 14,000 still in service. Today, output shaft horsepower varies with diff erent models between 420 to 715 shp.
HMM – With so many fl ight hours amassed and so many
engines still in service, what are some of the lessons learned in the fi eld by your product support specialists? PT – One of the problem areas we still fi nd that has a large cost impact to the operator is maintenance of the N1 and N2 tach drives. The male and female parts of the tach drives are square and fi t together. If the tach drives are not lubricated properly, the drives lose their squareness from lack of lubrication and become rounded and slip.
The Local Team You Know The Global Support You Need
RR250
PW200 A ROLLS-ROYCE AUTHORIZED REPAIR, MAINTENANCE & OVERHAUL CENTER 1-480-830-7780 |
info@aeromarusa.com December 2014 | January 2015
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