As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING DESCENT PACK AIR SMELLS LIKE WET DOG FOOD MUSTY SMELL. MAINTENANCE FOUND EVIDENCE OF AN HYDRAULIC LEAK AT UNION FROM THE YELLOW HYDRAULIC SYSTEM HIGH PRESSURE MANIFOLD TO CHECK VALVE (3083GM). MAINTENANCE REPLACED THE UNION PER CMM 29-11-20 AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK WITH NO ISSUES OR ODORS NOTED.