As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. ALL GREEN LIGHTS REMAINED ILLUMINATED, ALL RED LIGHTS REMAINED ILLUMINATED EXCEPT RIGHT B-LIGHT. TRIED TO CYCLE THE GEAR SEVERAL TIMES. REMOVED AND REPLACED RIGHT A-SYSTEM UP/DOWN HARNESS ASSEMBLY PER EMB120 MM 32-61-01. OPS CHECKS GOOD. P/N: 120-22623-501.