Final answer:
Level 4 Repair is the repair or replacement of turbine rotors and combustion sections, including afterburners, in turbine engines. It is the highest level of repair in the turbine engine maintenance program.
Step-by-step explanation:
The repair or replacement of turbine rotors and combustion sections, including afterburners, is known as Level 4 Repair. Level 4 Repair is the highest level of repair in the turbine engine maintenance program. During Level 4 Repair, turbine rotors and combustion sections that are damaged or worn beyond repair are replaced. This process involves disassembling the engine, removing the damaged parts, and installing new components. After the repairs are complete, the engine is reassembled, tested, and returned to service.
Level 4 Repair requires specialized training and expertise, as it involves working with complex turbine engines and high-temperature components. It is typically performed by skilled technicians and engineers in advanced maintenance facilities.