B737 flight crew reported receiving a second set of 'final' weights enroute.

Attributes
ACN	1310812
Time
Date	201511
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 188 Flight Crew Total 8150 Flight Crew Type 2229
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 54
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance

Narrative:

Approximately 2 hours after departure; we received a ZFW (zero fuel weight) correction over ACARS. Our ZFW was actually 1000 pounds higher than reported prior to departure. Apparently; cargo was added just prior to pushback but did not get reported to lp. Our take-off data and performance calculations were based on the wrong ZFW.

Original NASA ASRS Text

Title: B737 flight crew reported receiving a second set of 'final' weights enroute.

Narrative: Approximately 2 hours after departure; we received a ZFW (Zero Fuel Weight) correction over ACARS. Our ZFW was actually 1000 pounds higher than reported prior to departure. Apparently; cargo was added just prior to pushback but did not get reported to LP. Our take-off data and performance calculations were based on the wrong ZFW.

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.