Narrative:

The aircraft we flew from ord to yyz had just come from heavy maintenance following a seat reconfiguration. We flew the leg by SOP and in accordance with the fars and company policy. However; when we were taxiing out for our return leg; load planning said that we had to return to the gate as they had determined that the engineering tables in the computer didn't match the new configuration of the airplane. The captain and I then determined that we had flown the previous leg most likely with improper weight and balance information since the engineering tables had not been updated at that time. After a 90 minute delay; the captain; maintenance control; dispatch; and load planning coordinated to have the proper engineering tables inserted into the computer for the new configuration. We then received the correct weights for our flight back.

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Original NASA ASRS Text

Title: A320 flight crew reports accepting an aircraft out of heavy maintenance after a seating configuration change and flying their first leg. Prior to the next leg it is discovered that the weight and balance data has not been change to reflect the new configuration.

Narrative: The aircraft we flew from ORD to YYZ had just come from heavy maintenance following a seat reconfiguration. We flew the leg by SOP and in accordance with the FARs and company policy. However; when we were taxiing out for our return leg; Load Planning said that we had to return to the gate as they had determined that the engineering tables in the computer didn't match the new configuration of the airplane. The Captain and I then determined that we had flown the previous leg most likely with improper weight and balance information since the engineering tables had not been updated at that time. After a 90 minute delay; the Captain; Maintenance Control; Dispatch; and Load Planning coordinated to have the proper engineering tables inserted into the computer for the new configuration. We then received the correct weights for our flight back.

Data retrieved from NASA's ASRS site as of July 2013 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.