As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAB PR SAFETY VALVE OPEN DELTA P 8.4 AND CABIN ALT 9000 FT TILL 12000 OUTFLOW VALVE WASN'T WORKING. CAB LOW DIFF PR-TROUBLESHOT IAW TSM 21-31-00-810-808-A. R/R OUTFLOW VALAVE IAW AMM 21-31-51 OPS CHECK GOOD. PERFORMED PRESSURIZTION IAW AMM 05-53-00 TEST GOOD. NO FURTHER DEFECTS NOTED AT THIS TIME