As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 264 - MCI - ON TAKEOFF POWER APPLICATION, CAPTAINS ALTIMETER DROPPED 20 FT TO 980. AN OFF FLAG CME ON. A CROSS CHECK OF THE F/O'S ALTIMETER SHOWED THE SAME. REPLACED UPPER RT PITOT PROBE PER MM 34-11-11, LEAK CHECKS OF CAPTAINS AND F/O'S SYSTEMS NORMAL MM 34-11-0A. (M)