Cessna Twin Piston Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Commercial
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Returned To Departure Airport; Flight Crew Became Reoriented
Weather; Aircraft
My takeoff clearance from the runway was runway heading and to climb and maintain 2;000 feet MSL. I complied with this assignment and soon after takeoff was instructed to contact Departure. After contacting Departure they instructed me to climb and maintain 3;000 feet MSL and to make a right turn heading 150 degrees. During the turn I noticed the turn coordinator was not showing a turn; it was showing wings level and all other instrument indications were normal.After noticing this malfunction of the flight instrument I decided to return to the airport. I made this request with ATC and received radar vectors for the RNAV approach. While receiving vectors I noticed the turn coordinator start to show turns; but was still very 'sluggish' and inaccurate. After shutting the engines down I also noticed that the red 'OFF' flag did not appear in the window of the turn coordinator as it usually does. No circuit breakers were popped.
Cessna pilot reported that shortly after departure the turn and bank indicator malfunctioned. Pilot elected to return to field in IMC conditions.