As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH C/A AND F/O RADAR DISPLAYS "SPIKES" OR "SPIKING" INTERMITTENTLY ACROSS THE SCREEN IN ALL MODES OF OPERATION. PULLED & TAGGED WX R/T C/B. REMOVED AND REPLACED RD WX RADAR R/T PER 34 43 41 ROTABLE COMPONENT VERIFIED BY SEAMC. UNTAGGED & RESET C/B. SYS OPS CHECKS NORMAL PER 34 43 00.