Cessna 402/402C/B379 Businessliner/Utiliner
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Time Pressure
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Departure Airport
Aircraft; Human Factors
We arrived [at the airport] expecting a quick turnaround to head to ZZZ. Upon arrival; we were informed we would be changing airplanes. The aircraft was very recently out of Phase and was also flown and written up earlier in the morning for a brake malfunction. A preflight was conducted and no defects were seen or noted. We were originally scheduled for a 15 minute turn around but because of the aircraft switch; we were 30 minutes late. The First Officer was the pilot flying [to] ZZZ and everything went smoothly. It was a good landing and we made a 'quick turn' back. Upon arrival; the ramp agent handed me a Weight and Balance and unloaded/loaded the aircraft. We fired up and taxied to runway 6. Prior to departure; a run-up was conducted and the normal flows were completed and backed up by the checklist.  We departed runway 6 and noted sluggish performance almost immediately on climb out. We noted that although the Flap handle was in the up position; the flap indicator displayed about 37 degrees worth of flaps. We climbed to 1000 ft AGL; reference the QRH; notified the tower that we would be return to land and instructed the passengers of our intentions. The landing was normal.Scheduling demands led to a more rushed environment to conducting the normal walk around procedures. Had a walk around been completed; the flap issue would have been noticed. I take full responsibility for not conducting a walk around to notice the issue however I do believe had we not been scheduled for such quick operations this incident would have never happened.
C402C Captain reported after takeoff that while the flap handle was in the up position; the flap indicator showed 37 degrees down. Crew returned for normal landing. Captain indicated a walk around had not been completed.