As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GSO - FLIGHT NR 1794 - AFTER TAKEOFF, LANDING GEAR WOULD NOT RETRACT. GROUND FLIGHT FAULT ON MULTI FUNCTION DISPLAY UNIT. RETURNED TO GSO FOR LANDING. FOUND PROXIMITY SENSORS ON LEFT GEAR FOR FLT GROUND OUT OF ADJUSTMENT. ADJUSTED BOTH FLT GROUND PROXIMITY SENSOR IAW 32-63-03. (M)