The purpose of this part of ISO 3977 is to provide a basis for exchange of information about reliability, availability, maintainability and safety between gas turbine manufacturers, users, consultants, regulatory bodies, insurance companies and others. It defines terms and definitions used within this part of ISO 3977 and also describes component life expectancy, repairs and criteria for determining overhaul intervals.

This part of ISO 3977 is applicable to all elements of the gas turbine, especially, but not limited to, the following:

• compressor
• turbine
• combustion system
• intercooler
• regenerator or recuperator
• air ducting system
• exhaust ducting system
• air intake system
• control system
• fuel system
• lubrication system
• cooling water system
• rotor bearings
• gears
• coupling
• starting equipment
• baseplate/foundation
• enclosures and ventilation system.