Narrative:

On pushback the ground crew notified us that they were surprised by cargo they had to unload from forward hold (about 3200 pounds) following our inbound flight. We checked the load sheet from our prior flight and discovered it was not on the load sheet either. We basically took off unaware that we had extra weight in forward hold. In this case; in a relatively light -700; we had sufficient performance; however; our performance data was invalid and could be very dangerous in another scenario where performance limits would be much more restrictive. The agent either failed to complete the load sheet correctly or was unaware of the cargo as well. I don't know their process well enough to judge how to correct; but clearly this is a critical safety issue and we must have faith that our performance data is calculated based on valid aircraft weights.

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Original NASA ASRS Text

Title: A total of 3;200 lb.s of undocumented freight from a previous flight was not off loaded prior to this flight's departure. The pushback crew notified the flight crew about the undisclosed weight.

Narrative: On pushback the Ground Crew notified us that they were surprised by cargo they had to unload from forward hold (about 3200 pounds) following our inbound flight. We checked the load sheet from our prior flight and discovered it was not on the load sheet either. We basically took off unaware that we had extra weight in forward hold. In this case; in a relatively light -700; we had sufficient performance; however; our performance data was invalid and could be very dangerous in another scenario where performance limits would be much more restrictive. The Agent either failed to complete the load sheet correctly or was unaware of the cargo as well. I don't know their process well enough to judge how to correct; but clearly this is a critical safety issue and we must have faith that our performance data is calculated based on valid aircraft weights.

Data retrieved from NASA's ASRS site as of April 2012 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.