EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP)
Communication Breakdown; Situational Awareness
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented; General Maintenance Action
Human Factors
On climbout I noticed that the aircraft was climbing unusually slow. I said this to the Captain. We then realized that the after takeoff checklist had not been done properly and the flaps were still set at 9. We were less than 250 knots so we put the flaps up. We had exceeded the 250 knots restriction for flaps 9. We landed and called maintenance for an inspection. Lack of crew communication.  The checklist was called for but not completed.
During climb out; First Officer was wondering why we were slow on speed being 1/4 full. I then checked EICAS and noticed that the flaps were at 9 degrees. Aircraft was below 250 indicated; so I put the flaps back to 0. Under the circumstances I knew we have exceeded the flaps 9 at 250 kt. limitation as well as having the flaps down above 20;000 ft. Upon landing I informed maintenance control of the circumstances. They are in the process of an inspection.Prior to flight we were ramp inspected by the FAA right after having a line check the previous day. During climb out an additional distraction came from ATC not handing us off to Departure control for an extended period of time; then doing so at 10;000 ft. I don't remember the Flying Pilot calling for the checklist as well. We were light so the plane climbed out at a fast rate. The First Officer and I have flown together for the month; our working relationship is difficult due to personality conflicts. Even though we are getting along; issues with communication have developed due to this relationship.
EMB145 flight crew reports not retracting the flaps after takeoff and not properly completing the after takeoff checklist. The omission is detected above FL200.