The need for repair rather than replace of gas turbine components is becoming increasingly important to operators in today’s economic climate. The use of commercially available numerical analysis software, computational fluid dynamics (CFD) and finite element (FE) have become well established within Wood Group Light Industrial Turbines Ltd. They have allowed the business to be extremely competitive by being able to rapidly respond to a customers request for a repair which may involve a fluid structure interaction and/or conjugate heat transfer analysis. The software has also been used to study critical design limitations and to rapidly enhance reverse engineered parts. Two such cases are presented here: the repair of a compressor rotor blade airfoil and the changes made to an existing design of a cooling passage in a high pressure turbine rotor blade. Each analysis was completed in a very competitive time span.