As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER 1 HOUR 42 MINUTES OF FLIGHT, THE FIRST OFFICER`S ALTIMETER FLUCTUATED BY 1200 FEET THEN FAILED COMPLETELY. DECENDED FL 390 FOR FL 290 TO MAINTAIN CLEAR OF RVSM AIRSPACE. R & R THE FIRST OFFICER`S ALTIMETER IAW AMM 34-13. TESTED GOOD.