As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN ACTIVATING LEFT RECIRCULATION FAN SWITCH TO ON, CIRCUIT BREAKER WOULD POP. INSPECTED AND FOUND ON RCCB LOOSE AND ELECTRICAL CONNECTOR HAD SLIGHT HEAT DISTRESS. RCCB AND CONNECTOR WAS REMOVED AND REPLACED, SYSTEM OPERATES NORMALLY. (M)