As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING CRUISE, SMOKE WAS NOTICED IN THE COCKPIT. THE CREW DIVERTED AND DECLARED AN EMERGENCY. THE ACFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ISOLATED THE ISSUE TO THE PACK 1 SYSTEM. THE PACK 1 SYSTEM WAS DEFERRED. ACM ON THE PACK 1 SYSTEM WAS REPLACED. OPS CHECKED GOOD, NO FURTHER DEFECTS NOTED.