As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 7804, PDX - PSC AIR TURNBACK/DISCREPANCY: POD A DOOR OPENED DURING TAKEOFF. AIRCRAFT WAS RETURNED TO PDX. NO EMERGENCY WAS DECLARED. LANDED WITHOUT FURTHER INCIDENT. CORRECTIVE ACTION: MAINTENANCE INSPECTED THE POD A DOOR LATCHES AND POD DOOR. NO DEFECTS NOTED.