As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED "ALT DISAGREE" MSG, RTFL. REPLACED NR 2 AIR DATA COMPUTER - ACCOMPLISHED ALTIMETER ACCURACY CHECK OF CAPTS - F/O - STBY ALTIMETERS. ALTITUDE READOUT WITHIN LIMITS PLUS-MINUS 40 FT ON ALL 3 SYSTEMS AT 5000-10000-20000-40000 FT OF ALTITUDE. NO PITOT - STATIC LEAKS FOUND CHECKING SYS WITH "LAVERSAB" TESTER.