What was found
VERTICAL CRACK IN FMC SCREEN, CA SIDE. GROUNDED - YES. VERIFIED FAULT, OPEN C/B & INST. MIG51A. REPLACED CAPT. FMC CDU WITH SERVICEABLE ONE. CLOSED C/B & REMOVED MIG51A. ACCOMP. CDU SOFTWARE CONF. CHECK VERIFIED BOTH CDU'S HAVE SAME. ACCOMP. INST. TEST, TEST PASS REF. M/M 34-61-01-400-802 & 34-61-00-750-802.