Emb-170 captain reported ramp personnel discovered bags had not been unloaded from the aft cargo pit...

Narrative:

We were preparing to operate [the] flight. The ramp lead came to the flight deck to give us the load sheet; and asked if we had brought the aircraft in from ZZZ. I told him that we had operated that flight. He then informed us that the ramp personnel in ZZZ had not unloaded the aft cargo compartment when the aircraft arrived in ZZZ; as there were 13 ZZZ tagged checked bags in the aft cargo compartment that he discovered when we arrived in ord. This caused us to operate ZZZ-ord; with 390lbs of undocumented bags in the aft cargo compartment. Not knowing these bags were onboard then caused us to have inaccurate weight and balance information for this flight; including an inaccurate takeoff trim setting.suggest having the ramp personnel double check the aft cargo compartment when an aircraft arrives at the gate.

Original NASA ASRS Text

Title: EMB-170 Captain reported ramp personnel discovered bags had not been unloaded from the aft cargo pit at the previous airport. This caused the aircraft to operate with 390 lbs of undocumented bags on the flight to ORD.

Narrative: We were preparing to operate [the] flight. The Ramp Lead came to the flight deck to give us the Load Sheet; and asked if we had brought the aircraft in from ZZZ. I told him that we had operated that flight. He then informed us that the ramp personnel in ZZZ had not unloaded the aft cargo compartment when the aircraft arrived in ZZZ; as there were 13 ZZZ tagged checked bags in the aft cargo compartment that he discovered when we arrived in ORD. This caused us to operate ZZZ-ORD; with 390lbs of undocumented bags in the aft cargo compartment. Not knowing these bags were onboard then caused us to have inaccurate weight and balance information for this flight; including an inaccurate takeoff trim setting.Suggest having the ramp personnel double check the aft cargo compartment when an aircraft arrives at the gate.

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.

Attributes
ACN	1368157
Time
Date	201606
Local Time Of Day	1201-1800
Place
Locale Reference	ORD.Airport
State Reference	IL
Environment
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 170/175 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance

Emb-170 captain reported ramp personnel discovered bags had not been unloaded from the aft cargo pit at the previous airport. This caused the aircraft to operate with 390 lbs of undocumented bags on the flight to ord.