As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FLIGHT LEVEL 350 THE STANDBY ALTIMETER SHOWS 35600 FEET PERFORMED STBY ALTIMETER CHECK BY PRESSURIZING PITOT/STATIC SYSTEM IAW AMM 34-11-00. FOUND STBY ALTIMETER STICKING 500'' INCREMENTS AT A TIME. REMOVED AND REPLACED STBY ALTIMETER IAW AMM 34-13-06. NO FURTHER DEFECTS NOTED.