As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON SHORT FINAL INTO PHL THE FLAPS STUCK AT 30 DEGREES WHEN THE CREW OF FLIGHT 2304 SELECTED FLAPS 45. THE FLIGHT LANDED UNEVENTFULLY. PSA MAINTENANCE RESET CIRCUIT BREAKERS AND CYCLED THE FLAPS IAW BOMBARDIER SERVICE LETTER RJ-SL-00-001. THE FLAP SYSTEM OPERATIONALLY CHECKED GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.