As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE MAINTENANCE TECH REPORTED THAT DURING TROUBLESHOOTING OF APU SYSTEM IT WAS DISCOVERED THAT AN APU CIRCUIT BREAKER ON THE APU START PANEL WAS FOUND TO BE BROKEN AND WOULD NOT LATCH AND RESET. THE DEFECTIVE CIRCUIT BREAKER WAS REPLACED WITH A NEW BREAKER. OPS CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.