As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF CABIN PRESS AT FL 250 TO A CABIN ALT OF APPROXIMATELY 12,000. PERFORMED QRH IN MANUAL DID NOT CONTROL CABIN. PERFORMED FIM 21-31-00-810-823 CLEANED AREA AROUND CARGO DOOR SYS OPERATIONS CHECKED GOOD ON PRESS CHECK. PERFORMED CABIN DECAY CHECK IAW MM 05-51-91-790-801. DECAY WITHIN LIMITS.