Every turbine is issued a unique serial number (e.g., Serial No. 123456 or a specific country designation). Plant engineers must reference the exact documentation package supplied by GE or licensed manufacturing associates (such as Nuovo Pignone, Hitachi, or John Brown) for that specific serial number. Utilizing generalized or mismatched manuals can lead to catastrophic mechanical failures due to mismatched clearance specs, incorrect firing temperatures, or divergent control logic calibration settings.