What was found
FLT 3057 - ON DEPARTURE FROM DTW, WHEN GEAR SELECTED UP, HAD HYDRAULIC FAILURE. COMPLIED WITH QRH AND LOWERED GEAR AND FLAPS WITH EMERGENCY LANDING HANDLE. AIR TURNBACK TO DTW. MAINTENANCE REPLACED BANJO FITTING ON RIGHT MAIN GEAR IAW SAAB MM 32-34-15. GEAR SWINGS AND OPS CHECKED GOOD. (M)