As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAD - CREW REPORTED CAPTAINS ALTIMETER FAILED IN CLIMBOUT. FLAG IN VIEW AND NO HEIGHT INDICATION. EMERGENCY DECLARED FLIGHT RETURNED MAD LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED CAPTAINS ALTIMETER. SYSTEM GROUND CHECK NORMAL OPERATION. (CLOSED)