What was found
DURING D-CHECK AT SIN, DURING ZONAL INSPECTION IT WAS DISCOVERED THAT NR 3 ENGINE PYLON STRUT PRECOOLER EXHAUST VETN WITH CRACKS ON THE RIGHT SIDE OF THE STRUT. THE REPAIRS WERE MADE ON THE RIGHT SIDE OF THE STRUT STRUCTURE ASSEMBLY. THE NR 3 STIFFENER WAS REINFORCED WITH A NEW LOWER REPAIR ANGLE FROM NAC STATION 235 TO STATION 254. THE RIB INSTALLATION AT NAC STATION 248 WAS MODIFIED TO ACCOMODATE THE NEW STEEL REPAIR ANGLES INSTALLATION ON THE NR 3 STIFFENER. (M)