As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, GEAR HANDLE WOULD NOT MOVE TO THE UP POSITION. AIR RETURN PER QRH, SUSPECT FAILURE OF AIR/GROUND SENSING LOGIC. EXPERIENCED DEGRADED SYSTEMS INDICATED IN CHECKLIST. CHECKED INTERLOCK VALUE TELEFLEX CABLE RIGGING IAW AMM 32-09-01-825 -002, OK. FOUND AIR SAFETY SENSOR GAP TOO LARGE, ADJUSTED IAW AMM 32-09 -01-825-002, MAIN LANDING SAFETY SENSORS TEST CHECK GOOD.