As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RETURNED TO FIELD FOR AN ERRATIC STANDBY ALTITUDE INDICATOR. THE STANDBY ALTIMETER WOULD STICK AT 900FT EVERY TIME AROUND. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE STANDBY ALTIMETER WITH NO FURTHER DEFECTS NOTED.