As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FO SIDE ALTIMETER AND VSI FLUCTUATING IN FLIGHT. CLIMBING AND DESCENDING. NOT HOLDING SET ALT. HAD TO SOURCE TO CA SIDE ERRATICALLY FLUCTUATING 500-1000 FEET ON VSI "TRANSFERRED TO NRWC 765-DFW-01914" RAR INTEGRATED PITOT/STATIC/AOA SENSOR # 4 IAW EMB-170 AMM 34-13-01. ADS SYS. OPT IS GOOD IAW EMB-170 AMM 34-15-00.