As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURN TO FIELD DUE TO A LOSS OF GREEN HYDRAULIC SYSTEM. LOSS GREEN HYD FLUID LEVEL. YELLOW AND BLUE SYS APPEARS OK. SECURED GREEN HYD SYS PER IRREG PROCEDURES. INSTALL GROUND SAFETY LOCKS PER AMM 32-00-00 AND TROUBLESHOOT. SOURCE OF GREEN HYD QTY LOSS. REPLACED MLG DOOR GROUND OPENING BYPASS VALVE PER AMM 32-31-13-000-001 AND 32-31-13-400-00 1. OPS CK'D PER 32-31-00-710-002-01. SYS OP CKS.