As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:NAFO ALTIMETER ERRATIC IN CLIMB, CRUISE & DESCENT. DURING CLIMB IT HESITATES, ALMOST REVERSES COURSE BEFORE CLIMBING MORE. THIS HAPPENS APPR. EVERY 100 FT. THIS BEHAVIOR IS THE SAME IN DESCENT. DURING CRUISE IT HOLDS STEADY THEN JUMPS UP & DOREMOVED AND REPLACED RIGHT AIR DATA COMPUTER PER M 34-12 01. NO CURRENT FAULTS ON 30 CHECK