As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CAPTAIN REPORTED SMOKE IN THE FLIGHT DECK AND DIVERTED, NO INCIDENTS UPON LANDING. MAINTENANCE PERSONNEL AFTER INVESTIGATION FOUND CODE 939 RGB CHIP DETECT FAIL ON NR 2 ENGINE. CHIP DETECTOR INSPECTED AND METAL FOUND. AIRCRAFT REMOVED FROM SERVICE UNTIL FURTHER RESOLUTION.