As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC SYSTEM 1 LOW PRESSURE CAUTION MESSAGE. FOUND A BAD O-RING AT THE NR 1 SYSTEM FORWARD FILTER PRESSURE SWITCH. REMOVED AND REPLACED THE O-RING IAW AMM 29-11-05. SERVICED THE RESERVOIR IAW AMM 12-12-29. PERFORMED HYDRAULIC NR1 LEAK CHECK. NO LEAKS NOTED