As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THE TAXI OUT, #1 HYDRAULIC 1B CAUTION ILLUMINATED, FOLLOWED BY #1 HYDRAULIC LOW PRESSURE CAUTION MESSAGE. #1 HYDRAULIC RESERVOIR ON SYNOPTICPAGE SHOWED NO FLUID. REPAIRED BROKEN HYDRAULIC LINE FOR BLUE #1 HYDRAULIC SYSTEM (HYDRAULIC SERVICE LINE/SYSTEM RETURN LINE) IAW MM 20-22-00. LEAK CHECK GOOD.