As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ARRIVAL, WITH ENGINES RUNNING UNABLE TO PLACE APU ON LINE UNLESS NR 1 GENERATOR BREAKER TRIPPED. TROUBLESHOT IAW FIM TASK 24-21 TASK 301. FOUND GENERATOR CONTROL BREAKER AT FAULT. REMOVED AND REPLACED BREAKER IAW 24-21-41. OPERATIONAL CHECKED GOOD. RETURNED AIRCRAFT TO SERVICE. (K)