What was found
DURING THE COURSE OF AN RADIO MODIFICATION, SPECIFIC SNAGS APPEARED DURING THE POST-INSTALLATION AND TESTING PHASE OF THE CHECK WITH THE FOLLOWING DISCREPANCY NOTED: "DURING THE CONTOUR SEAT POWER UPS, MCU NR 1, J2 PORT SHORTED OUT MAKING MCU UNSERVICABLE" MCU NR 1 J2 PORT WAS SHORTED OUT MAKING THE MCU U/S. DURING THE POWER UP OF THE SEATS 1-9 IN SEQUENCE, ARRIVING AT SEAT 5F THE SIB (SEAT INTERFACE BOX) STARTED TO ARC AND TRIPPED OFF MCU NR 1 AND DAMAGED THAT LRU. CAUSE HAS BEEN DETERMINED TO BE A FAULTY SEB FROM CONTOUR UNIT REPLACED. FAULTY UNIT SENT TO MANUFACTURER FOR FURTHER ANALYSIS.