What was found
DURING REPLACEMENT OF THE NR 2 CYLINDER, THE CONNECTING ROD BUSHING, PN 530658, HAD MOVED FROM THE CONNECTING ROD BORE IN A REARWARD DIRECTION & EXHIBITED MISSING MATERIAL FROM CONTACT WITH THE PISTON PIN BORE BOSS. THE ENG WAS COMPLETELY DISASSEMBLED FOR FURTHER EXAMINATION. INSPECTION REVEALED THAT NR 1, 2, 3 & 4 CONNECTING ROD BUSHINGS WERE DISPLACED FROM THEIR NORMAL POSITION. THE BUSHINGS WERE REMOVED FROM EACH OF THE SIX CONNECTING RODS. THE CONNECTING ROD, PN 655911, BUSHING BORES WERE MEASURED & NR 1, 2, 3 & 4 CONNECTING ROD BUSHING BORES MEASURED OVERSIZE BEYOND PUBLISHED LIMITATIONS. THESE CONNECTING RODS HAD BEEN OVERHAULED BY AN OUTSIDE REPAIR STATION IN DECEMBER 2013 WHEN THE ENG LAST OVERHAULED. THE NR 5 & 6 CONNECTING ROD BUSHING BORES MEASURED WITHIN PRESCRIBED LIMITATIONS.