Overhaul Gas Turbine Repairs

At Mechanical Dynamics & Analysis (MD&A) we specialize in providing overhaul gas turbine repair services for power generation plants worldwide. Our team of experienced engineers and technicians offer a full-service, OEM-alternative for steam turbines, gas turbines, and generators to a wide range of clients.

Our Turbine-Generator Repair Facility experts understand the importance of having a well-maintained and properly functioning gas turbine. That’s why we make repair recommendations based on the owner’s intended operating plans for the unit. This ensures that our clients receive the best possible recommendations for gas turbine repairs.

We pride ourselves on our effective and time-tested principles that allow us to produce sound and superior repair solutions for gas turbine-generator rotors and components. Our team has the knowledge and expertise to address all types of gas turbine issues, ensuring that your power generation plant runs smoothly and efficiently.

Why choose MD&A?

For almost 40 years, our commitment to excellence has earned customer trust for all turbine-generator needs. We focus on delivering consistent quality and value with fast response, superior communications, and innovative solutions.

MD&A is easy to work with. We provide immediate access to expert help when you need it, where you need it. Around the corner or the globe, we ensure prompt, thorough communication, and follow-through. For every repair job, large or small, the speed and effectiveness of our response team are matched only by the depth and breadth of our engineering expertise.

Find out today why so many power generators use MD&A to maximize operational effectiveness.

The Gas Turbine Repairs capabilities that we offer include the following:

1.       Rotor Repair

MD&A offers full capabilities for your gas turbine rotor maintenance and end-of-life assessment. Our one-stop-shop, Turbine-Generator Repair facility in St. Louis, MO, is equipped with overhead cranes, a 100-ton lathe, and all support equipment for inspections and repairs.

2.       Component Repair

Our gas turbine experts are highly focused on providing quality gas turbine component repairs. Our team is trained in many types of component repairs, like dimensional restoration, blend repair, weld repair, and machining for combustion and gas path components of multi-frame gas turbines

3.     Fuel Nozzle Repair

Our Fuel Nozzle Services Division provides refurbishment and repairs of fuel nozzles in gas turbines. Our experts provide services for GE® gas turbine Frame 5 fuel nozzles, Frame 7 fuel nozzles, Frame 6 fuel nozzles, and Frame 9 fuel nozzles including standard, Multi-Nozzle Quiet Combustor (MNQC), and Dry Low NOx System (DLN) 1.0, 2.0, and 2.6 for industrial and power generation customers.

4.     Machining Services

We offer a wide variety of portable gas turbine field machining and steampath repair services to use on-site. Our Turbine-Generator Repair Facility machining capabilities include in-shop and on-site repair horizontal joints for turbine casings, defective rotors, valves, or other turbine-generator components.

5.     Portable Machine Shops

We have multiple portable machine shops available for use during plant projects. Clients can also use these shops during an outage. Our shops are available in portable Conex trailers and are fully stocked with drill passes, metal grinders, lathe, and many other essential tools

6.     Compressor Vane Pinning Solutions

Multiple power plant owners notice shim migration and compression rocking issues. Our highly skilled professionals have expertise in gas turbine repair techniques and leading-edge equipment for these issues.

Overhaul Gas Turbine Repairs

7.     Bearing Ball Ring Repairs

MD&A’s Bearings, Seals, and Hydraulics division performs precise journal bearing ball ring repairs utilizing our horizontal bore machine. We provide a complete restoration to the spherical fit and can perform checks to ensure proper assembly on site.

8.     Rapid-Spares Gas Turbine Bearings

MD&A Bearings, Seals & Hydraulics Division can handle bearing-related issues with the help of pro-active planning. The Rapid-Spares bearing exchange reduces the uncertainty of the bearing refurbishment conditions at the time of critical outage intervals.

9.     High-Speed Balance

Our high-speed balance facility in St. Louis, MO is designed with vacuum capabilities and the ability to excite generator rotors at high speed. This allows our engineering specialists to handle turbine and generator-related balancing and testing effectively.

10.     Elliptical Journal

We design, repair, and manufacture elliptical bearings to remove the steam whirl or oil whip side effects of your gas turbine. We also provide short cycle delivery, insulation mounting and spherical mounting restoration, and performance monitoring instrumentation.

11.   Tapered Land Thrust

MD&A’s Bearings, Seals & Hydraulics Division can manufacture, and repair tapered land thrust bearings. We can provide material upgrades, fixture profiling, instrumentation in performance monitoring, and short cycle delivery.

Overhaul Gas Turbine Repairs

12.   Tilt Pad Thrust

A tilt pad thrust bearing retrofit is a cost-effective solution when sole plate settling or other foundation changes have created poor alignment conditions. We offer clients predictable bump check shim sizing and complete assembly reconditioning.

13.   Bronze Turbine Seal Rings

The Bearings, Seals, & Hydraulics Division at MD&A provides a range of bronze turbine seals rings that include manufacturing to spec, in-house stocking of custom alloys, and expedited delivery on a short cycle.

14.   Oil Deflectors

MD&A Bearings, Seals & Hydraulics Division offers complete oil deflector reconditioning to assure the long-term integrity of a tight oil sealing system. Our inventory includes seal tooth material, dowels, steam painting/cleaning, and body bolt components.

15.   Tilt Pad Journal

One of the gas turbine repairs we offer is tilt pad journal bearing retrofits. A tilt pad journal is useful for managing the effects of steam whirl or oil whip conditions. We offer complete assembly, provide material upgrades, performance monitoring instrumentation, and short cycle delivery.


Our skilled and experienced team of experts is invested in providing high-quality testing and gas turbine repair services. With our help, you can improve the operating conditions of your unit and discover any underlying issues that may be affecting your fleet. Talk to one of our experts and discover all the repairs we offer, get in touch with us as soon as possible.

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