As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST PRESSURIZATION AT FL370-380. CABIN ALT WENT TO 13000 FT AND CABIN ALT WARNING MESSAGE ILLUMINATED. EMERGENCY DESCENT TO 10,000 FEET. REPLACED SAFETY VALVE NR 1 IAW CRJ AMM 21-32-03. OPERATIONAL CHECKS GOOD, PN: GG670-98005-1, SN ON: 00804 SN OFF: 00653.