What was found
DURING AN 100 HR INSPECTION, THE TAIL BOOM REQUIRES A VISUAL INSPECTION. UPON INSPECTION THERE WAS EVIDENCE OF SMOKING AROUND THE FORWARD NYLON SLEEVE WHERE THE PITCH CHANGE CONTROL TUBE TRAVEL THROUGH. FURTHER INVESTIGATION REVEALED INDEED THE NYLON SLEEVE HAD ERODED THE BULKHEAD MATERIAL ENLARGING THE HOLE HOLDING THE SLEEVE IN PLACE. ROBINSON HAS BEEN NOTIFIED. THE TAIL BOOM WAS REPLACED WITH A NEW BOOM AND AIRCRAFT RETURNED TO SERVICE.