Commercial Fixed Wing
Communication Breakdown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Procedure
Load planning called dispatch to notify the Captain of flight ZZZZ-ZZZ that a 110 pound shipment including a hazmat non-flammable gas AOG 10 pounds is on board and was not included on the manifest.
ZZZZ Ops called to advise me that that a Hazmat AOG item was left on board [Aircraft X] out in the bulk pit. ZZZZ didn't know how to manifest it once they realized it was onboard and the plane was airborne back to ZZZ. I advised the Ops agent to contact the Cargo Help Desk. We both called the Cargo Help Desk and talked with [personnel]. She said since they had no manifest for it and the aircraft was already airborne; there was nothing that could be done. After talking to my Shift Manager; I contacted Dispatch and the ZZZ station to advise them of the situation.
Airline Dispatcher reported flight crew notification of Hazmat cargo on board aircraft but not listed on load manifest.