As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 230, CABIN PRESSURE LIGHT ILLUMINATED. THE CREW PERFORMED EMERGENCY CHECKLIST AND DESCENDED TO 22,000 FT. AT 22,000 FT, CABIN PRESSURIZATION WAS MAINTAINED. MAINTENANCE INSPECTED AND FOUND THE FORWARD MAIN ENTRY DOOR LEAKING DURING PRESSURIZATION CHECKS. MAINTENANCE ADJUSTED THE ENTRY DOOR SEAL DEPRESSOR IAW DC-9 MM 52-11-00. OPERATION CHECKS WERE COMPLETED AND CHECKED GOOD IAW DC-9 MM 21-32-00.