As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HOT - FLT 1311 - AFTER NORMAL GEAR RETRACTION, CREW NOTICED HYDRAULIC PRESSURE LOW. LIGHTS CAME ON WHEN FLAPS UP WAS SELECTED. CREW CONFIRMED HYDRAULIC PRESSURE LOW ON HYD PRESSURE GAUGE. GEAR PUMPED DOWN AND ACFT RETURNED TO STATION WITH NO FURTHER INCIDENT. HYDRAULIC ACCUMULATOR HAD CRACKED ON HYD FLUID END CAUSING HYD FLUID LOSS. REMOVED AND REPLACED HYDRAULIC ACCUMULATOR, SERVICED AND OPS CHECKED SYSTEM. SYSTEM OPS CHECKED GOOD. (X)