As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLEED 2 LEAK MESSAGE IN FLIGHT. BURNING SMELL NOTICED BY CREW AND PAX. PASSENGERS SEATED IN ATF CABIN ALSO NOTED BURNING SMELL. FLIGHT DECLARED EMERGENCY. C/A: DURING INSPECTION FOUND PACK 2 DUCT BLOWN. RE-INSTALLED BLOWN DUCT, IAW ETN-EM-056. OPS CHECK/LEAK CHECK GOOD. PERFORMED ENGINE ODOR EVENT T/S SUPPLEMENT ETN-EM-72-034. NO BURN/SMELL WAS NOTED. A/C IS GOOD FOR SERVICE.