As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, ON CLIMB-OUT WITH ATC 2 SELECTED ON TRANSPONDER "NR 2 XPNDR DATA BUS" AND "XPNDR TCAS DATA" DISPLAYED ON RADAR/TCAS SCREEN SWITCHED TO ATC 1 OPS NORMAL, HOWEVER ALL TARGETS ON TCAS SCREEN ARE YELLOW. T/S PER FIM 34-53-00-1, SYS CKD OK UNABLE TO DUPLICATE BOTH ATC TRANSPONDERS BITE CKD OK. TCAS CK OK AS WELL. SYS OK FOR SERVICE.