As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPT ALTIMETER MOMENTARILY WENT A FEW THOUSAND FEET LOW THEN RAPIDLY RECOVERED PASSING FL 340 IN CLIMB AND DESCENT. VSI ANOMALY NOTED AS WELL(<P>PERFORMED OPS TEST OF AIR DATA COMPUTING SYS, OPS TEST GOOD IAW AMM 34-12-00, NO DEFECTS NOTED.</P>)