What was found
DURING CLIMB-OUT, NR 1 BLEED LEAK INDICATION EXTINGUISHED ONCE BLEED VALVE WAS CLOSED RETURNED TO DFW. REMOVED AND REPLACED BLEED LINE O-RING AT JOINTS 7, 9, 11, 17 AND JOINT ABOVE 17 FOR NR 1 BLEED IAW EMB-145-AMM 36-11-10, LEAK CHECK GOOD AIRCRAFT RETURNED TO SERVICE.