B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 7699; Flight Crew Type 1923
Situational Awareness
Deviation / Discrepancy - Procedural Weight And Balance; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Procedure
We had a valid takeoff weight before takeoff. 19 minutes after takeoff we received a new weight manifest which put our weight 2000# less than our takeoff weight. This would have been a huge safety issue if the weight error had been 2000# heavier!
Aircraft X departed ZZZ. [13 minutes later;] dispatch received a message regarding a weight change of 2018lbs after closeout. Apparently; the ramp personnel in ZZZ discovered a load of mail that had been listed as loaded on board the aircraft. This resulted in a decrease to the Zero Fuel Weight and Takeoff Gross Weight of 2018lbs. It is unknown if that also changed the Percent MAC or Trim Settings. The crew was informed of the weight change and advised to file a [report].
A Boeing 737 Captain and a Dispatcher reported that it was discovered after takeoff that the weight manifest included 2000 pounds of cargo that was not loaded.