As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF LT HYD QTY WENT TO ZERO. ACFT DID A UNSHEDULED LANDING BACK INTO DEPARTURE. UPON TAXI IN MX TECH VISUALLY INSPECTED THE LT HYD SYS RESERVOIR FOR SERVICE IAW AMM 12-13-01, WHICH INDICATED FULL. THE LT HYD INDICATION SYS WAS PLACED ON DEFERAL AND THE ACFT RELEASED FOR SERVICE IAW MEL 29-21, CAT C AUTHORIZATION M29MA25-4512 DUE DATE 4-4-2011 PLACARD INSTALLED.