As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI - FLT 3903 - DURING DESCENT WHEN FLAPS WERE LOWERED CREW RECEIVED A SLATS FAIL MESSAGE ON EICAS. AN EMERGENCY WAS DECLARED AND AIRCRAFT WAS LANDED WITH NO FURTHER INCIDENTS REPORTED. MAINTENANCE REMOVED AND REPLACED THE RIGHT SLAT ACTUATOR IAW CRJ MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)