856A1655G04 is a professional ground support tool for aircraft engine fuel system maintenance, engineered to AS9100D quality standards and FAA/EASA MRO regulations, optimized for narrow-body engines like CFM56-5B/7 and V2500. It enables fuel line flushing, pressure testing, and contamination detection for engine fuel supply and return circuits during overhaul and troubleshooting.

Constructed from corrosion-resistant stainless steel and aerospace-grade aluminum, it features a high-precision pressure regulator (0–150 psi, ±0.2% accuracy), 5μm filtration system, digital contamination sensor, and quick-connect aviation fittings. Its compact, wheeled design (750×480×600mm, 27kg) ensures easy mobility across maintenance bays. Compliant with RTCA DO-160G, it eliminates fuel system contaminants, reduces MRO downtime, and safeguards engine combustion efficiency for commercial airline fleets.