98F07203021046 is a precision aviation maintenance tool compliant with AS9100D quality standards and FAA/EASA regulations, dedicated to aircraft engine fuel system maintenance.It functions as a fuel injector calibration tool, specialized in precision calibration of fuel injector nozzles during MRO overhauls. It accurately verifies and adjusts injection pressure, spray angle and fuel atomization uniformity, ensuring consistent fuel delivery, optimized combustion efficiency and stable engine performance, preventing power fluctuations, idle instability or incomplete combustion that leads to carbon deposits and fuel waste.Made of high-strength stainless steel with anti-corrosion coating, it resists fuel erosion and wear, working stably at -55℃ to 200℃. Weighing 0.38kg, its compact precision design fits narrow engine bays, enabling accurate operation. It is a critical tool to maintain fuel injector accuracy and overall aircraft engine operational safety.