As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION FELT ON CABIN FLOOR AS WELL AS HUM. LEFT HYDRAULIC (A) SYSTEM FLUCTUATED BETWEEN 2400-3300 PSI. WHEN GEAR WAS SELECTED DOWN LEFT HYDRAULIC PRESSURE WAS 2100 AND RIGHT HAD AN OT(AMBER) LIGHT. UPON LANDING THEY GOT A (B) SYSTEM FALL MESSAGE, BOTH SYSTEM PRESSURES WERE 1800 PSI. APPARENT CAUSE: HYDRAULIC SYSTEM MALFUNCTIONED. MAINTENANCE CORRECTION IN PROGRESS.