What was found
AIR RETURN DUE TO BLEED 2 LEAK MESSAGE AFTER TAKEOFF. QRH COMPLIED WITH, MESSAGE WENT AWAY AFTER 3 MINUTES. THEN BLEED 2 LEAK MESSAGE RETURNED WITH BLEED 2 OFF. BLEED 1 TURNED OFF IAW QRH. BLEED 2 MESSAGE WAS INTERMITTENT THOUGH ALL BLEEDS WERE OFF. QRH ISOLATION STEPS LED TO ACFT BEING UNPRESSURIZED. DURING TROUBLESHOOTING FOUND CONNECTOR P2146 WITH A BROKEN PIN. R & R CONNECTOR P2146 (CH1) IAW CMM 26-14-53. OP'S CHECK GOOD. PERFORMED LEAK CHK AT RT BLEED LINES. NO LEAKS NOTED OR FAULTS NOTED DURING HIGH POWER RUN.