As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOTS ALTIMETER BLANKED OUT AND ALTITUDE ALERTER DIED. THE ADC WAS FOUND TO BE DEFECTIVE AND REPLACED. THE SYSTEM WAS TESTED AND INSPECTED AND FOUND TO COMPLY WITH FAR 91 AND TO REMAIN RVSM COMPLAINT. THERE HAVE BEEN NO PRIOR REPORTS OF PROBLEMS WITH THIS SYSTEM. (GL07200602750) (K)