As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 5421 - CREW REPORTED FLOOR PROXIMITY LIGHTS IN THE FORWARD SECTION ARE INOPERATIVE. PUT ON MEL AT THIS TIME. MAINTENANCE FOUND CANNON PLUG FOR THE POWER SUPPLY UNIT DIRTY. CANNON PLUG WAS CLEANED, OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)