Overhauls don’t have to be overpriced.

Our experts guide you and your engine through every aspect of the overhaul process … possibly saving you hundreds, thousands, even tens of thousands of dollars. Beginning with a thorough engine inspection, we prepare a build specification and find the right overhaul shop — one that can deliver the greatest performing engine at the best value and highest safety margin. What’s more, because of the volume of engines we manage, we are afforded deep pricing concessions, giving you an even better value.

Welcome to SpecialtyTurbine.com 6.0

Working for major turbine repair companies for over 20 years, I managed thousands of engines through the overhaul process for corporate operators. During this time, I learned that due to the complex nature of the turbine repair business, many of the cost saving options for the customers were never explored.

I started this company in 1991 to provide corporate turbine owners with the opportunity to employ a team of experts that will take the time to explore each and every option during overhaul. With our experience, you can be assured that all cost saving options are explored on every overhaul or repair project. While we can't change the condition of your engine, we can advise you on how to make your engine overhaul investment go further. Our service insures a higher quality engine and fair value. On that, you have my promise.

We invite you to visit our website and please feel free to contact me at any time for additional information.

Sincerely,

Paul Jones
President, Specialty Turbine Service, Inc.

While completing routine maintenance on our JT15D-1A engine, our mechanic reported small traces of metal in the main oil screen. Is it normal to have small amounts of metal in the oil system?

Answer:
"Unlike a reciprocating engine - or a PT-6 for that matter - there is very little surface to surface material contact in the JT15D engine. Therefore, the basic answer to your question is ""no.""

However, while it is not normal for a JT15D engine to exhibit metal during operation, there are several gears in the accessory gearbox assembly, as well as the main line bearing train.

When a JT15D engine generates metal internally, it is normally due to the upper or lower tower shaft bearing supports. The tower shaft transmits rotational power, via a bevel gear arrangement to the gearbox assembly. The shaft is supported by a duplex bearing at the upper and lower end of the shaft.

During normal operation, the bearing will attempt to rotate in the housing. The lower tower shaft bearing is held in place by a snap ring, which will over time and cause movement of the lower bearing in the aluminum housing. This can generate non-ferrous material. If movement of the bearing becomes extensive, the housing will wear and ferrous material will be produced.

Service bulletin 7372 provides bolt down retention of the lower tower shaft bearing, reducing the movement and reducing the movement - and the risk of this wear pattern.

Service bulletin 7372 provides bolt down retention of the lower tower shaft bearing, reducing the movement and reducing the movement - and the risk of this wear pattern."