As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT UPON DESCENT THE NR 2 ALTIMITER DISPLAYED A RED X. THE CREW RAN THE APPROPRIATE CHECKLIST AND DECLARED AN EMERGENCY. THE ACFT LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. DRAINED WATER FROM PITOT SYS IAW AMM 34-13-00 AND OPS CHHECKED ADC SYS IAW AMM 34-15-00. THE ACFT WAS RETURNED TO SERVICE.