AP4 Services
Our Approach to Field Services

Our field service engineers can provide 24/7 support to safely diagnose and complete all troubleshooting & maintenance, from planned outage and project execution, to unplanned outage and post-outage reporting

+Full borescope inspections

+Quarterly, Semi-annual & Annual package inspections

+Full alignments and alignment verification

+Vibration Troubleshooting

+VSV Bushing change out & HPC Top Case Repairs

+HP Recoup & Thrust Balance Checks

+Fuel Nozzle Installation & Exchanges

+Troubleshooting all aspects of package and engine problems

+Preventive and corrective maintenance & inspection performed

on the complete Gas Turbine package & BoP

+Gas Turbine Removal & re-installation (R&R)

+Full Package Start-up & Commissioning

+Gas Turbine Preservation

+Implementation of Service Bulletins

+Provide parts & supporting tooling for above tasks

+Generator Minor Inspections & Maintenance


AP4 Services is focused on the ever-changing needs of our customers. It is our mission to provide the highest quality Field Engineers with the correct skill set to support our customers’ requests. We commit to providing the customer with cost-effective solutions to improving the REAL issues of your plants

AP4 Services provides support and troubleshooting services, power generation solutions and expert engineering support to meet the growing needs of today’s power industry. From the newest technology to the aging fleet of turbine generators, AP4 Services can support all your needs

AP4 Services provides expert support in all GE™ Turbine Control Systems, Excitation, and LCI Static Starters. We also have a wide range of knowledge of other platforms including but not limited to Instrumentation, PLC, Protection Relays, BOP and Mechanical systems. If AP4 Services doesn’t have an expert in-house, we know someone who does



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