What was found
AFTER DEPARTING BAGRAM AIRFIELD HYD OVERTEMP LIGHT ON CAUTION ADVISORY PANEL ILLUMINATED ALONG WITH CORRESPONDING SYSTEM 1 HOT LIGHT ILLUMINATING ON THE OVERHEAD PANEL. PILOTS FOLLOWED CHECKLIST AND TURNED NR 1 FLT HYDRAULICS OFF AND RETURNED TO BASE. UPON RETURN TO PARKING DETERMINED NR 1 FLT WAS STILL HOT AND THE NR 1 PUMP WAS THE SOURCE. NO FILTERS WERE BYPASSED. DEBRIS IN PRESSURE MANIFOLD FILTER AND RETURN FILTER BOTH OF WHICH HAVE A DIRECT LINE TO THE PUMP, NO DEBRIS IN THE FWD NR 1 PRESSURE FILTER. PERFORMED REQUIRED MAINTENANCE AND PERFORMED FOLLOW ON CHECKS, REINSPECTED FILTERS TO DETERMINE NO DEBRIS REMAINED. RETURNED AIRCRAFT TO SERVICE.