B767-300 and 300 ER
Flight Crew Air Transport Pilot (ATP)
Confusion; Distraction; Time Pressure; Workload
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Weight And Balance; Deviation / Discrepancy - Procedural FAR
General None Reported / Taken
Chart Or Publication; Procedure
Flight scheduled to depart as a live passenger flight with a Tech Stop Only. The operating crew was a 2 man crew with a flight time scheduled of 04:30.The flight crew was given an [automated] weight and balance with a Traffic Load of 76;178 LBS. which comprised a PAX count of 240 souls. The Zero Fuel Weight was calculated at 275;127 LBS. and Total Fuel of 65;200 was onboard. The flight crew ran the numbers using SOP and ACARS W/B and the total Take Off Weight was calculated to be 339;327 after taxi out burn. All indications were that this was a normally presented and calculated W/B. The ACARS W/B information was obtained and normal SOP's followed.The flight proceeded normally and we concluded the flight at the planned destination. Nothing out of the ordinary occurred during the flight. We did not see the receiving or outbound crew.Myself and the First Officer proceeded to a nearby airport via taxi for our respective commercial Dead Head flights.After my Dead Head flight I received information from the crew accepting the A/C that there had been some form of error on the [automated] W/B we received and that there was an error in the Traffic Load weight for the 240 PAX and that the weight 'should' have been much higher at approximately 84;156 LBS. The difference of some approximately 8;000 LBS. In essence we were given an incorrect W/B and the aircraft for our flight heavier.I ran the numbers after the fact with this new information and found that no structural or operational weights were exceeded in this case.The receiving crew only realized the error when their W/B coupled with the fuel placed on the aircraft put the aircraft in an overweight situation. This was told by the receiving crew.I was thankful for the information and the effort on their part to inform me.  There seems to be a break down in SOP procedures that lead into this situation. There may be a breakdown in the way the [automated] Passenger Weight and Balance is being administered and used to provide the required weight and balance information to the Flight Crew. This should be addressed so that a potential ill event does not occur.
A B767 Captain reported being informed after the flight that his automated computed weight was approximately 8;000 pounds below the as loaded weight.