As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ADQ - COMPLETE LOSS OF NR 2 HYDRAULIC SYSTEM FLUID QUANTITY. PERFORMED ABNORMAL PROCEDURES CHECKLIST AND RETURNED TO ADQ. MAINTENANCE ARRIVED ADQ REMOVED AND REPLACED NR 1 MAIN GEAR DOOR SOLENOID SEQUENCE VALVE IAW DASH 8 MAINTENANCE MANUAL 32-10-51. CLEANED NR 1 MAIN LANDING GEAR OF HYDRAULIC FLUID. REMOVED UNIT HAD TWO OF FOUR BOLTS THAT HOLD THE SOLENOID AND VALVE TOGETHER SHEAR, ALLOWING THE SOLENOID TO SEPARATE FROM THE VALVE.