This machinery diagnostic analysis case study presents the analysis and root cause investigation of very high vibrations amplitudes encountered during the re-start of a 501F Gas Turbine Generator from a major overhaul outage. The presentation covers the vibration analysis that lead to further field maintenance activities, ending with successful operation of the unit. This Webinar will explain the newest Brüel & Kjær Vibro patented technology that corrected this gap in sensor waveform and FFT collection. We will explore the legacy problem, the design that eliminates it, and details of the technology in practice.