As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON LANDING THE NR 1 HYD SYSTEM FLUID QTY WENT TO ZERO. THE ACFT WAS TOWED TO THE GATE FROM THE TAXIWAY. MAINTENANCE INVESTIGATION FOUND THE LT INBD ROLL SPOILER ACTUATOR HSG FRACTURED AND LEAKING. THE ACTUATOR WAS REPLACED. ROLL SPOILER ACTUATOR, PN A44700-009, S/N 0326.