As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, FLIGHT EXPERIENCED GRADUAL PRESSURE LOSS. AIRCRAFT DESCENDED TO 10,000 FEET AND CONTINUED UNPRESSURIZED TO DTW. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED LEAK CHECK OF LEFT AND RIGHT PACKS AND PRESSURE CHECKED AIRCRAFT. OPERATIONAL CHECK OK.