As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON CLIMBOUT RADIO ALTIMETERS STARTED FLASHING DASHED LINES THEN WENT ON STEADY. THEN THE GPWS LIGHT CAME ON AND TCAS FAIL. ALL BREAKERS IN. ALL INDICATIONS BECAME INTERMITTENT ON DESCENT AT 5000. THEN SYSTEM WORKED NORMAL FOR REMAINDER OF DESCENT. REMOVED RAD ALT FROM NR 1 ANTENNA SYSTEM AND CONNECTED TO NR 2 ANTENNA SYSTEM. RAD ALT, EGPWS, TCAS, ALL TESTS GOOD NOW.