Steam turbine rotors and bearings are classified as what level of repairable part?

Steam turbine rotors and bearings are classified as depot level repairable parts because these components require specialized skills, tools, and facilities for maintenance and repair that go beyond the capabilities typically available at field or unit levels. Depot level maintenance is conducted at a central facility equipped to handle complex repairs, refurbishments, and overhauls that involve significant disassembly and testing. This level focuses on deeper repair work that ensures the long-term operational status and reliability of critical equipment like steam turbines.

Field level maintenance usually involves simple repairs or replacements that can be carried out by personnel in the immediate area without specialized resources. Intermediate level maintenance represents a higher capability than field level but would not typically include the in-depth repairs that steam turbine components require. Unit level maintenance is the most basic level, focusing on daily checks and minor repairs that do not involve disassembly or extensive work on critical components. Hence, depot level is the appropriate classification for steam turbine rotors and bearings.