As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC SYSTEM 1 LOST QUANTITY INITIALLY 0 BUT AFTER LANDING RECOVERED TO 2.2 GAL. ACFT STILL HAD 3.7 GAL OF HYDRAULIC FLUID IN NR 1 SYS. TROUBLESHOOTING FOUND NR 1 SYS BRAKE ACCUMILATOR HAS A BLOWN O-RING. REPLACED O-RING IAW SMP, SERVICED ACCUMILATOR IAW MM 32-12-01-3, LEAK CHECKED GOOD. RAN NR 1 ENGINE IAW JRH. NO AIR IN SYS FOUND. OK FOR SERVICE.