Engine MRO-provider StandardAero said at Heli-Expo 2016 in Louisville, Kentucky, that it plans to offer a new program to reduce maintenance intervals for helicopters powered by the Rolls-Royce M250 turbine engine.
The M250 engine was released in 1966 by Allison Engine Company, and more than 30,000 engines have been produced with 12,228 currently in service. StandardAero, which has serviced the M250 for 49 years, said a common reason for that engine’s maintenance is when “moisture finds its way under the plastic coating of the compressor case, causing breakout” and requiring operators to replace the coating. StandardAero said this makes it difficult to reach the 3,500-hr time-before-overhaul for compressor assemblies.
StandardAero said it soon will offer a lifetime guarantee program for M250 Series II compressor cases revolving around its patented EnduroCoat 3500 process, which it developed and verified in salt spray tests of both plastic compressor coatings and bare metal parts, such as airfoils.
“We have improved the way the plastic bonds to the parent material of the compressor case,” said the company in a presentation, adding it has seen “significantly improved results in every test: thermal cycling, wedge crack, salt spray and lap shear testing.” The company also said it guarantees the compressor case lifetime of 3,500 hr or five years from delivery. Applicable part numbers include 23057142, M250-10199.
The program starts March 1, and StandardAero said it already is accepting orders for exchange compressor cases at Heli-Expo.