As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3135 NR 1 HYD QTY LOW. 1 HYD QTY AMBER INDICATION AOM 1 PRQC COMPLETE. RETURNED TO DFW & DECLARED EMERGENCY & LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. COMPLIED WITH ETN-EM-29-023, SEE ITEM NR 3 & 4 OF THIS PAGE & ITEM NR 1 AML PG 3414476 FOR FINAL CORRECTIVE ACTION. INSTALLED NEW HYD LINE IAW EMB AMM 20-10-03. LEAK CHECKED GOOD IAW AMM 27-23-04 & OPERATIONS CHECKED GOOD IAW EMB AMM 27-23-00.