As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT RADIAL SPIKING ON EHSI RADAR DISPLAY ON BOTH CAPTAIN`S AND FIRST OFFICER`S EHSI IN BOTH LT & RT SYSTEMS. PERFORMED FIM 34-22 FT 806 AND AMM OPS TEST 34-43-00, LT AND RT WX RADAR SYSTEMS. NO FAULTS FOUND, BITE TESTS AND TEST PATTERNS DISPLAYED OK.