As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 HYD SYS LOST CONTENTS AFTER TAKEOFF. RETURNED TO FIELD. NR1 ENGINE MANUALLY SHUTDOWN NO MORE THAN 8 MINUTES AFTER LOSS. FOUND NR 1 EDP PRESSURE LINE "B" NUT LOOSE UNDER PANEL 412DT. RETORQUE "B" NUT, SERVICED NR 1 HYD, SYS CHECKED GOOD. REINSTALLED PANEL 412DT, SEALED AND RII COMPLIED WITH. CASE DRAIN FILTER INSP REVEALED NO METAL PARTICLES IAW -8, MM 05-50-53.