Commercial Fixed Wing
Dispatch Dispatcher
Communication Breakdown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
Flight was airborne at XA55z; I was notified at approximately XD15z/[Date] about a Dangerous Goods shipment that was boarded; but not properly documented.  Preliminary load had no Dangerous Goods listed; so crew wasn't looking for any Dangerous Goods information. Sent the Dangerous Goods information to the crew: 1 pc; 63 lbs; UN2915 [Radioactive Material; Type A Package]; T.I. 1; medical shipment containing SR-82 [Strontium-82]. Loaded in bulk pit 51. Discussed with crew and will continue to destination.
Airline Dispatcher reported being notified of departed flight had unreported Dangerous Goods on board.