As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 1704, RVSM, ALTITUDE SPLIT AT VARIOUS FLIGHT LEVELS, CAPTAIN'S ALTITUDE WAS 29960 AND FIRST OFFICER'S ALTITUDE WAS 29200. CORRECTIVE ACTION: REPLACED RT ADC AND LEFT AUX PITOT PROBE AND RIGHT F/O UPPER PITOT/STATIC PROBE. (9186359)