As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GROUNDED - RIGHT RADIO ALTIMETER FAILED AT APPROX. FL180 WITH RA IN BOX ON F/O PFD, AT SAME TIME WE GOT NO LAND 3 AND SMOKE ODOR IN FLIGHT DECK FOR TWO MINUTES. REMOVED AND REPLACED R/H RADIO ALTIMETER PER AMM 34-33-01. REMOVED AND REPLACED FWD EQUIPMENT COOLING AIR FILTER PER AMM 21-58-07. ACCOMPLISHED CARD 05-96-70 - SMOKE ODOR FUMES TROUBLESHOOTING, NO FAULTS OR EVIDENCE OF ODOR. AIRCRAFT OK FOR SERVICE.