As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKE OFF IN ROUTE, THE MESSAGE HYD NR1 LOW PRESS CAUTION CAME ON EICAS . CREW COMPLIED WITH QRH AND RETURNED. AFT EQUIPMENT WAS SOAKED WITH SKYDROL. A LEAK WAS FOUND ON A RETURN LINE ON THE HYD NR1 MANIFOLD. THE LINE AND ELBOW WERE REPLACED , ACFT BACK TO SERVICE.