Narrative:

Flight XXX was a little north of ZZZ when I got called by load planning saying there was a piece of hazmat that was loaded and not reflected in the weight manifest. There were two pieces of hazmat for this flight with piece 2 was supposed to be held off. When the original weight manifest was done; both pieces were reflected to be held off when piece 1 was loaded in pit 3. The flight took off and cargo made a call to investigate and that was when the mistake was discovered. An updated pilot notification and weight manifest change was sent to the flight crew when the flight was a little south of ZZZ.

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Original NASA ASRS Text

Title: Airline Dispatcher reported receiving corrected Hazmat cargo weights after aircraft departure. Updated Hazmat data was sent to aircraft.

Narrative: Flight XXX was a little north of ZZZ when I got called by Load Planning saying there was a piece of Hazmat that was loaded and not reflected in the weight manifest. There were two pieces of Hazmat for this flight with piece 2 was supposed to be held off. When the original weight manifest was done; both pieces were reflected to be held off when piece 1 was loaded in pit 3. The flight took off and Cargo made a call to investigate and that was when the mistake was discovered. An updated pilot notification and weight manifest change was sent to the flight crew when the flight was a little south of ZZZ.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.