As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAINS ALTIMETER WOULD SHOW ALTITUDE BOUNCING UP TO 200FT DURI NG FLIGH T IN LEVEL FLIGHT. CAPTAIN''S ALTIMETER REPLACED IAW AMM. 34-13-01-404-004. ALL OPS NORMAL. ADD EMP:314121 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1152089 SN OFF 2356 IPC REFERENCE # 31-11-11-27