As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB-OUT, CAPTAINS ALTIMETER FAILED ALONG WITH ALTITUDE ALERTER. BOTH DISPLAYS SHOW HEADING FLAGS. ATC ADVISED WE WERE OFF COURSE AND ALTITUDE WAS NOT REPORTING. RETURNED TO FIELD. REPLACED CAPTAINS ALTIMETER WITH SERVICEABLE UNIT. PERFORMED PITOT STATIC LEAK CHECK IAW MM 34-22-00.