As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS HYD. QUANTITY INDICATED ZERO SYS. B WHEN SLATS EXTENEDED PRESSURE WENT TO ZERO. ALT. FLAP EXTENSION USED TO LOWER FLAPS. MAINTENANCE FOUND HYDRAULIC PRESSURE UNION QUICK DISCONNECT LEAKING AT THE #2 ENGINE HYDRAULIC PUMP. REMOVED AND REPLACED UNION AND OPS CHECKED GOOD IAW AMM 29-11-11.