As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO RETRACT LG AFTER TAKEOFF. INSTALLED RT MLG EXTEND SENSOR 20GA IAW MM 32-31-73-400-001-A. FIRST SENSOR FROM STOCK WAS NO HELP. TRIED SECOND SENSOR & ALL WAS GOOD. SHOOK OUT WIRING FROM 20GA TO THE JUNCTION BOX ON TOP OF THE GEAR. RAN ENGS FOR 5 MINUTES & NEW PFR SHOWED NO FAULTS.