As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 3009 - THE CREW REPORTED CAPTAINS ALTIMETER FAILED IN FLIGHT. THE AIRCRAFT RETURNED TO CLEVELAND WITHOUT FURTHER INCIDENT. MAINTENANCE RESET CANNON PLUG ON BACK OF CAPTAINS ALTIMETER. PERFORMED OPERATIONAL CHECKS IAW BEECH MM 34-12-04. THE AIRCRAFT WAS RETURNED TO SERVICE. (M)