First officer reported being notified in flight of changes to the weight manifest.

Narrative:

This report is in regards to a possible weight and balance error. After mcd was closed and pushback from gate; we were contacted by operations that one additional (late) bag came from tsa for our flight. The baggage tug drove out to where we were pushed back. It looked like a heavy bag. However; the captain (ca) pilot in command (PIC) decided not to load the late bag. His reason being the crj er would reset the out time and indicate a late departure; when the cargo door is opened. The ramp understood and assured the late bag would be sent later and make final destination; eventually.after an on time departure during cruise climb we received an ACARS message from [dispatch] indicating the ramp made an error reporting the bag count. The cargo load report initially had a total of 76 bags. The update from [dispatch] had an updated; actual total of 54 bags. Also; the bags zone placement was much different than the original clear paperwork count. I did a paper weight and balance calculation. The aircraft was not out of cg and not over maximum gross takeoff weight (mgtw). The ca/PIC was advised; and the flight continued without further interruption or contact from [dispatch]. This was basically a full passenger flight in a crj er aircraft. On take-off; I did not notice any unusual trim forces. The aircraft handled perfectly. Nonetheless; I would recommend our customer service management and ramp management is properly notified.

Original NASA ASRS Text

Title: First Officer reported being notified in flight of changes to the weight manifest.

Narrative: This report is in regards to a possible weight and balance error. After MCD was closed and pushback from gate; we were contacted by operations that one additional (late) bag came from TSA for our flight. The baggage tug drove out to where we were pushed back. It looked like a heavy bag. However; the Captain (CA) Pilot in Command (PIC) decided not to load the late bag. His reason being the CRJ ER would reset the out time and indicate a late departure; when the cargo door is opened. The ramp understood and assured the late bag would be sent later and make final destination; eventually.After an on time departure during cruise climb we received an ACARS message from [dispatch] indicating the ramp made an error reporting the bag count. The cargo load report initially had a total of 76 bags. The update from [dispatch] had an updated; actual total of 54 bags. Also; the bags zone placement was much different than the original CLR paperwork count. I did a paper weight and balance calculation. The aircraft was not out of CG and not over Maximum Gross Takeoff Weight (MGTW). The CA/PIC was advised; and the flight continued without further interruption or contact from [dispatch]. This was basically a full passenger flight in a CRJ ER aircraft. On take-off; I did not notice any unusual trim forces. The aircraft handled perfectly. Nonetheless; I would recommend our customer service management and ramp management is properly notified.

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	1318084
Time
Date	201512
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Bombardier/Canadair Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance