As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4434 (ORF TO BOS) CREW RECEIVED 14TH STAGE BLEED LEAK MASTER CAUTION. PERFORMED AIRTURN BACK TO ORF. EMERGENCY WAS DECLARED. REMOVED AND REPAIRED RIGHT PYLON DUCTING IAW CRJ 30-21-02. LEAK CHECK AND OPERATIONS CHECK GOOD. RETURNED TO SERVICE.