Narrative:

The flight was a [ferry flight] reposition originally scheduled to fly to ZZZ1; but the destination was changed to ZZZ2 by the [operations] for unknown reasons. The [flight plan] showed the flight released under part 91. The aircraft was diverted to ZZZ from the previous days ZZZ1 flight due to the crew oxygen system leaking to zero psi. The first officer and I completed our preflight duties which included the additional supplementary procedure for ferry flights with the cabin unoccupied. We verified with our point of contact in ZZZ; that no cargo was onboard and he also reconfirmed all galley carts were on board and empty except for our crew provisions. Once again we were told the cargo compartments were empty. Per the supplementary procedure we communicated this information to dispatch. We received our final weights and requested takeoff performance for runway xxr. I was the pilot flying; and upon vr I initiated rotation and found the aircraft to be very nose heavy; requiring a noticeable second effort to rotate the nose up for lift off and climb out. I remarked to the first officer that the trim setting was way off. The freight in the forward compartment would explain the nose heavy trim setting. We operated the flight and landed in ZZZ2 on runway xxr and taxied to gate xx and completed our checklists. Upon exiting on to the jet bridge we observed the ramp personnel unloading several containers and pallets of cargo from the forward cargo compartment. The next morning I called dispatch to inquire if there was any cargo listed on our weight manifest. Dispatch said that our flight had no cargo listed on the manifest. However; upon subsequent investigation; [maintenance] showed that in fact there was 17;433 lbs. Of freight loaded in the forward cargo compartment. This weight was not accounted for in our final weight manifest; nor in our takeoff and landing performance calculations. An investigation is being made as to why the flight crew; load planning and dispatch were all told that there was no cargo on board; when in fact there was. Hopefully necessary precautions can be made to prevent its occurrence in the future.

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Original NASA ASRS Text

Title: B767 flight crew and Dispatcher reported during takeoff the trim setting felt incorrect and later discovered undocumented cargo was on board.

Narrative: The flight was a [ferry flight] reposition originally scheduled to fly to ZZZ1; but the destination was changed to ZZZ2 by the [Operations] for unknown reasons. The [flight plan] showed the flight released under part 91. The aircraft was diverted to ZZZ from the previous days ZZZ1 flight due to the crew Oxygen system leaking to zero psi. The First Officer and I completed our preflight duties which included the additional Supplementary Procedure for ferry flights with the cabin unoccupied. We verified with our point of contact in ZZZ; that no cargo was onboard and he also reconfirmed all galley carts were on board and empty except for our crew provisions. Once again we were told the cargo compartments were empty. Per the supplementary procedure we communicated this information to Dispatch. We received our final weights and requested takeoff performance for runway XXR. I was the pilot flying; and upon Vr I initiated rotation and found the aircraft to be very nose heavy; requiring a noticeable second effort to rotate the nose up for lift off and climb out. I remarked to the First Officer that the trim setting was way off. The freight in the forward compartment would explain the nose heavy trim setting. We operated the flight and landed in ZZZ2 on runway XXR and taxied to gate XX and completed our checklists. Upon exiting on to the jet bridge we observed the ramp personnel unloading several containers and pallets of cargo from the forward cargo compartment. The next morning I called Dispatch to inquire if there was any cargo listed on our weight manifest. Dispatch said that our flight had no cargo listed on the manifest. However; upon subsequent investigation; [maintenance] showed that in fact there was 17;433 lbs. of freight loaded in the forward cargo compartment. This weight was not accounted for in our final weight manifest; nor in our takeoff and landing performance calculations. An investigation is being made as to why the flight crew; load planning and dispatch were all told that there was no cargo on board; when in fact there was. Hopefully necessary precautions can be made to prevent its occurrence in the future.

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.