As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE AT FL370, WATCHED GREEN HYD RESERVOIR LEVEL DROP TO RED DOT. COMPLIED WITH QRH. LOSS OF GREEN SYS DID NOT REACH RED DOT IN YELLOW BAND. DURING LANDING, REPORTED THAT GREEN SYS RETURNED TO HAT BAND AREA. RAN GREEN HYD SYSTEM & OPERATED FLIGHT CONTROLS. GREEN SYS MAINTAINED 3000 PSI PRESSURE & DID NOT LOSE FLUID QTY. REMOVED AND REPLACED GREEN HYDRAULIC RESERVOIR QTY TRANSMITTER IAW MM 29-31-11-04. OPS AND LEAK CHECKED GOOD. RESTORED FREE FALL MECHANISM TO NORMAL OPERATING CONDITION. IAW MM 32-33-00-02.