As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C LEFT BNA WHEN THE GEAR WOULDN'T RETRACT, CREW MADE A UNSCHEDULED LANDING BACK TO BNA AND SWAPPED A/C. MAINTENANCE FOUND THE RIGHT SIDE PROX SWITCH LOOSE. RE-SECURED THE PROX SWITCH AND SWUNG THE GEAR SIX TIMES, LET SET FOR THIRTY MINUTES AND RE-SWUNG THE GEAR. ALL CHECKS WERE GOOD AND WAS RELEASED BACK TO SERVICE.