As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT WING OUTBOARD SLAT INBOARD SLAT ACTUATOR, THE EXTEND HYDRAULIC LINE FRACTURED AT RADIUS LEADING TO SWIVEL FITTING DURING FUNCTION CHECK OF SLATS DURING TAXI OUT TO END OF RUNWAY. SLATS WOULD NOT RETRACT AND LOW QUANTITY OF HYDRAULIC FLUID AND LOW PRESSURE. TAXI RETURN TO GATE.