As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
1.5 HRS AFTER T/O, C-SYS HYD LO QTY LIGHT SAME ON AND QTY WENT MOMENTARILY TO 1/4 THEN BACK TO 3/8. FOLLOWED POM AND WITH NO PUMPS ON / NO SYS PRESS / QTY SLOWLY DECREASED OVER NEXT 3 HRS TO 1/16 LEVEL AND REMAINED THERE. EDP LOW PRESS LIGHT WAS ON BRIEFLY UNTIL EDP TURNED OFF. FOUND C-SYS PRESS LINE LEAKING. REPLACED SAME. LEAK CHECK OK AND SERVICED HYD SYS.