As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 2416 - EWR - CREW REPORTED HYDRAULIC SYSTEM 1 LOW QTY MESSAGE ON TAXI AND HYDRAULIC SYSTEM 1 FAIL MESSAGE ON DURING GATE RETURN. DURING TAXI BACK TO GATE, LOSS OF TILLER COMMAND. EWR MX FOUND HYDRAULIC SYSTEM 1 PRESSURE SWITCH LOOSE. MX RESECURED PRESSURE SWITCH AND PERFORMED OPERATIONAL CHECKS FOR HYDRAULIC SYSTEM AND TILLER SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.