What are typical fuel system components that are inspected or replaced during a turbine engine overhaul?

• A. Oil cooler, radiator, and thermostat.
• B. Fuel pump/drive, fuel control unit, metering valves, fuel nozzles/atomizers, fuel lines, filters, and anti-ice/bleed air systems.
• C. Turbocharger bearings only.
• D. ABS hydraulic pump and brake lines.

Answer: (B)

Fuel system integrity and precise fuel metering are central to a turbine engine overhaul. The components that are inspected or replaced are those directly involved in delivering the right amount of clean fuel to the combustor and ensuring reliable operation across all engine speeds. The fuel pump and drive supply fuel from the tanks at the correct pressure; the fuel control unit and metering valves regulate how much fuel is permitted to flow as demand changes; the fuel nozzles or atomizers create the proper spray and vaporization for efficient combustion; the fuel lines carry fuel between stages without leaks or degradation; filters keep contaminants out to protect pumps, valves, and nozzles. Anti-ice and bleed air systems are included because ice and blockages in the fuel system can disrupt fuel flow or heating, so these portions are checked to prevent icing and ensure consistent fuel supply under all conditions. This combination covers the essential pathways, control, and conditioning needed for safe engine operation.