As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4701, ENROUTE GEG - PSC AIR TURNBACK / DISCREPANCY: VIBRATION IN FLIGHT DUE TO POD DOOR BEING OPEN. RETURNED TO GEG. NO EMERGENCY DECLARED. CORRECTIVE ACTION: MAINTENANCE PERFORMED GVI OF AFFECTED AREA. NO FAULTS FOUND. OPS CHECK OF DOOR SATISFACTORY.