As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD HISSING NOISE AT FLT LV 230 FELT PRESS CHANGE DECLARED EMERGENCY. INSPECTS PAX SEAL FOUND SEAL IN LWR RH CORNER TO BE LOOSE AND OUT OF TRACK. REINSTALLED SEAL INTO TRACK CLEAN SEAL AND PREFOMED PRESS CK NO LEAKS NOTED. SYS LEAK CHECK GOOD AT THIS TIME IAW CRJ 900 AMM 52-11-07-400-801 A02 AND 52-11-07-201-801 A01 52-00-00-790-801-A01