What was found
DURING POST-MAINTENANCE ENGINE RUNS, HYDRAULIC FLUID WAS NOTICED LEAKING FROM LINE. FURTHER INVESTIGATION REVEALED A SERIES OF CORRODED PIN HOLES LOCATED UNDER THE LINE IDENTIFIER TAPE PLACARD. THIS SITUATION IS SIMILAR TO THE PROBLEM THAT AFFECTED THE RUDDER BIAS BLEED AIR LINES ON THE RC1125-700 (SB 27-157R2). SUBMITTER RECOMMENDS PLACARDING TAPE BE REMOVED FROM LINES AND SURFACES AND BE VISUALLY INSPECTED FOR CORROSION. OPERATOR CONTROL NR 96-002.