As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 6817 -ATB/PRES/DE- DUE TO CABIN ALT WARNING AND CABIN ALT ABOVE 10K. CREW MANUALLY DEPLOYED OXYGEN MASKS. CORRECTIVE ACTION: FOUND INSULATION BLANKET INGESTED INTO UPPER POSITIVE PRESSURE RELIEF VALVE, R/R POSITIVE PRESSURE RELIEF VALVE, R/R CABIN PRESSURE SELECTOR, R/R BOTH CABIN PRESSURE CONTROLLERS, RPLCD ALL BELLY DRAIN VALVES, C/W SEAL REPAIR AT BOTH B/B DOORS.