As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DESCENT FOR THE BASE, THE CAUTION HORN AS WELL AS (HYDRAULIC PRESSURE) LIGHT CAME ON. A/C LANDED WITHOUT INCIDENT. UPON INSPECTION, HYDRAULIC PUMP BELT WAS FOUND BROKEN, LAYING ON THE TRANSMISSION DECK. THE BELT WAS BROKEN AT THE JOINT.