As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT ENCOUNTERED A HYD SYS 1 FAILURE AFTER DEPARTURE. FLIGHT DID AN AIR TURNBACK. ATC HAD CFR ON STANDBY FOR ARRIVAL. FOUND THAT NR1 HYD QTY DROPPED TO ZERO, FOLLOWED BY PRESSURE DROP TO ZERO PSI. L3 MULTIFUNCTION SPOILER WAS LEAKING. REPLACED LT L3 MFS IAW AMM. CONSIDERED SERVICEABLE. MFS PN 414800-1009, SN 2012.