What was found
PDIS 522 21-30 9022 14MAY22 ANC FACT U CLIMBING THROUGH APPROX. FL210, WE GOT A LEVEL 1 AVIONICS FAN OVRD ALERT. SHORTLY AFTER, APPROXIMATELY LEVELING AT FL310, WE GOT A LEVEL 1 CABIN INFLO LO ALERT. FOLLOWED QRH AND MONITORED CABIN ALTITUDE. OUTFLOW VALVE WAS FULLY CLOSED. CABIN ALT. WAS SLOW BUT CONTINUED TO CLIMB APPROXIMATELY 40-100 FPM. MAX CABIN ALTITUDE WAS 8500 BY THE TIME WE COORDINATED WITH ATC TO RETURN AND DESCEND. FACT 14MAY22 05:46 ANC U INTERROGATED CFDS AND FOUND CPC-1 AND CPC-2 FAULTING MOTOR OUTFLOW VALVE AND ACC-2 FAULTING PK2 FLOW CTL VLV. RTS FOR ALL PASSED. FOLLOWED MD11 FIM 21-31-00-2 AND FOUND 12 INCHES OF SEAL PROTRUDING FROM MAIN CARGO DOOR. AFTER DOOR WAS OPENED FOUND APPROX THREE FEET OF THE SEAL COMPLETELY OUT OF THE TRACK. REINSTALLED DOOR SEAL IN THE TRACK PER MD11 AMM 52-00-00-4. FUSELAGE PRESSURE DECAY TEST CHECKS GOOD PER MD11-AMM 21-00-00-5 WITH NO CURRENT FAULTS. OK FOR SERVICE.