As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC SYSTEM A WENT DOWN TO 58 % IN FLIGHT. LOST 10 % DURING THE LEG. RETURNED TO NORMAL INDICATIONS AFTER LANDING. NOTED FLUID DRIPPING OUT OF HELL HOLE DRAINS AND AREA THICK WITH VAPOR. REPLACED O-RING FROM LEAKING UNION AT ELEVATOR FEEL COMPUTER ASSEMBLY IAW AMM 27-31-37. NO LEAKS NOTED. OPS CHECKED GOOD.