As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF "HYD 1 LO PRESS" NOTED. PRESSURE FLUCTUATED 2100-2300 PSI. RAN QRH WITH PUMP IB ON PRESSURE DROPPED BELOW 1800 PSI AND CONTINUED TO FLUCTUATE. NO QUANTITY REDOUT FOR HYD NR 1 ON SYNOPTIC. SHUTDOWN NR 1 ENG AFTER LDG 32 MIN LATER. (ACFT RETURNED TO DEPARTURE AFTER T/O -- EMERGENCY DECLARED) REPAIRED NR 1 EDP SUCTION LINE IAW AMM TASK 20-22-00-910-802. LEAK CHECK GOOD.