What was found
DURING HFEC INSPECTION PER SB 53A2390R1, FOUND BS 1480 L/S SPLICE PLATE FITTING HOLES NR 9 AND 10 WITH CRACK INDICATIONS. REMOVED LONGERON EXTENSION STRAP. REAMED HOLES TO REMOVE CRACKS. CONFIRMED NO CRACKS. FABRICATED BUSHINGS AND INSTALLED PER STANDARD PRACTICES IAW 747-53A2390R1 TO NOMINAL SIZE OF .5625 INCH DIAMETER. REINSTALLED LONGERON EXTENSION STRAP. REPEAT INSPECTION INTERVAL REDUCED BY 6000 CYCLES TO A THRESHOLD OF 12000 INITIAL AND 3500 REPETITIVE THEREAFTER. (M)