As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALTIMETER DISAGREE EICAS MESSAGE. FO ALTIMETER BOUNCING BETWEEN 200 AND 300 FT LOWER THAN CAPTAIN`S. RAN QEH AND USED ALTIMETER DATA ALTERNATE. RESET RT ALTIMETER C/B. COMPLIED WITH RT ADC BITE. NO FURTHER ISSUES NOTED. C/W IAW AMM 34-13-01. SYSTEM OK FOR SERVICE.