Franciszek Sadczuk, Alex Jones and Callum Reynolds provided the goals which gave Airbus maximum points, sub Alex Cooper replying for Gresford from the penalty spot.
Quite a jolt for leaders Llandudno as they suffered just a second defeat of the season.
Still top on goal difference, Tudno crashed at Connah’s Quay, whose goals came from Thomas Malcolm, Jamie Brennan and subs Denislav Kostadinov (2) and Alfie Bennett, Sam Parry (pen) and Tom Monks responding for the visitors.
Bangor kept their title bid on course with a convincing win over close challengers Bala.
Josh Roberts (2), Liam C Jones, Noah Hughes and top marksman Connor John, who came on as a sub on the hour, shared the home goals, Michael-jay Ashworth and Louis Parsonage for the Lakesiders.
Bay moved level on points with leaders Llandudno Reserves after a five-goal whipping of Ruthin.
Freddie Naylor, Logan Sumner, Efan Bowden-Williams, sub Anthony Poole and Dylan Culshaw-Roberts all bagged one apiece for the Seagulls.
Sixteen-year-old hotshot Noah Hughes pocketed a hat-trick for on-fire Bangor at Leeswood Pitches.
Josh Roberts (2) and Liam C Jones scored the rest for the title contenders.
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