As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNSCHEDULED LANDING, FLIGHT 5045, SECOND FLIGHT, PILOTS REPORTED SMOKE IN THE COCKPIT. MAINTENCE INSPECTED RELAY PANELS ON THE RT AND LT SIDES. MAINTENANCE FOUND LOOSE TERMINAL ON REMOTE CONTROL CIRCUIT BREAKER 0265. MAINTENANCE SECURED RCCB TERMINAL IAW MM 24-52-05 AND SECURED APU TEST PROBE POINT AT RT APU RELAY BOX. REFERENCE GMM VOL 6 9.1.0. SUBSEQUENT OPERATIONAL CHECK FLIGHT SATISFACTORY. NO ODOR/SMOKE NOTED.