As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK: LOSS OF SYSTEM "A" HYDRAULIC FLUID. FOUND SEALS LEAKING AT NR 6 SPOILER ACTUATOR. O-RINGS (P/N NAS1612-12) REPLACED IAW BOEING CMM 27-60-41. LEAK AND OPS CHECK NORMAL. NOTE: PART IS "ON CONDITION" THEREFORE TIMES AND CYCLES ARE NOT TRACKED.