Narrative:

Parked at gate and doing weight and balance we noticed that the center of gravity was past the aft limits. I took the center of gravity wheel and spun 5 people out of C and put them in a. This put us in the aft caution range which I thought said empty seats in each section must be aft. After we took off; I checked again and saw it said all empty seats must be aft. We still had people seated in section C while we were in the aft caution zone. The flight was conducted without incident. I should have read the caution remarks more closely and I think I assumed the warnings were the same as the EMB145 which stated each section must be aft.

Related reports:

Google
 

Original NASA ASRS Text

Title: AN EMB170 CREW DEPARTED IN THE WT AND BALANCE AFT CAUTION RANGE BECAUSE THEY INCORRECTLY APPLIED THE EMB145 CAUTION TO THEIR EMB170.

Narrative: PARKED AT GATE AND DOING WT AND BAL WE NOTICED THAT THE CTR OF GRAVITY WAS PAST THE AFT LIMITS. I TOOK THE CTR OF GRAVITY WHEEL AND SPUN 5 PEOPLE OUT OF C AND PUT THEM IN A. THIS PUT US IN THE AFT CAUTION RANGE WHICH I THOUGHT SAID EMPTY SEATS IN EACH SECTION MUST BE AFT. AFTER WE TOOK OFF; I CHKED AGAIN AND SAW IT SAID ALL EMPTY SEATS MUST BE AFT. WE STILL HAD PEOPLE SEATED IN SECTION C WHILE WE WERE IN THE AFT CAUTION ZONE. THE FLT WAS CONDUCTED WITHOUT INCIDENT. I SHOULD HAVE READ THE CAUTION REMARKS MORE CLOSELY AND I THINK I ASSUMED THE WARNINGS WERE THE SAME AS THE EMB145 WHICH STATED EACH SECTION MUST BE AFT.

Data retrieved from NASA's ASRS site as of January 2009 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.