What was found
AFTER GEAR RETRACTION, LEFT MAIN GEAR SYSTEM-A RED LIGHT STILL ILLUMINATED. LOUD VIBRATION IN AIRCRAFT. TROUBLESHOOT SYSTEM. FOUND PUSHED BACK PIN ON A-UPLOCK CONNECTOR, RESET PIN. REMOVED AND REPLACED A-UPLOCK HARNESS AND BOTH PROXIMITY SENSORS. ADJUSTED UPLOCK PLUNGER. SWUNG GEARS SEVERAL TIMES AND ALL CHECKED GOOD IAW EMB MM 32-61-01. HARNESS - P/N ON 120-41126-1, S/N ON T01743, S/N OFF T01747. PROXIMITY SENSORS P/N ON 7S-00370-02, S/N ON (TOP) 592 (BOTTOM) 588. S/N OFF (TOP) 582, (BOTTOM) 585.