As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT THE APU FIRE BOTTLE ARMED PUSH TO DISCHARGE GREEN LIGHT WOULD NOT ILLUMINATE. MAINTENANCE INSPECTED AND FOUND CONNECTOR 1PS1WA LOOSE. MAINTENANCE THEN RESECURED CONNECTOR 1PS1WA IN ACCORDANCE WITH SMP. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.