What was found
MLG HYDR LINE HAD BEEN CHAFING ON A FUSELAGE STRINGER. THE LINE HAD BEEN ORIGINALLY POSITIONED AGAINST THE EDGE OF THE STRINGER. THE STRINGER HAD WORN THROUGH THE SPIRAL WRAP AND INTO THE WALL OF THE TUBING. AFTER REMOVING THE HYDR LINE, IT WAS CHAFED BEYOND ALLOWABLE LIMITS. THIS IS THE SECOND ACFT IN THE PRECEDING 6 MONTHS THAT WE HAVE FOUND WITH PARTICULAR DAMAGE. INCORRECT ROUTING OF HYD LINE WITH MISSING, DAMAGED OR OUT OF PLACE SPIRAL WRAP. (K)