As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROC - FLIGHT NR 2040, THE CREW REPORTED A NR 1 HYDRAULIC LOW QUANTITY IN FLIGHT. REPORTED LOSS OF ALL NR 1 HYDRAULIC FLUID IN FLIGHT. MAINTENANCE INSPECTED AND REPLACED THE PRESSURE SUPPLY PRESSURE SWITCH. ALSO, REPLACED THE NR 1 HYDRAULIC PUMP AND FILTER.