As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT LOSING LT HYD QTY, QRH FOLLOWED, PUMPS OFF & HYD QTY STOPPED DECREASING. ACCOMPLISHED AMM FAULT TREE 29-11-815 & FOUND DPI INDICATOR LEAKING FROM O RING ON EDP PRESS MODULE. REPLACED O RINGS IAW MM 29-11-17. PRESSURIZED & CHECKED FOR LEAKS, NONE. QTY HAD DROPPED TO .48. SERVICED HYD SYS.