As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2422: CABIN PRESSURE WARNING. RAN CHECKLIST, AFTER TURNING BLEED FLOW TO MAX, RATE WENT TO 1500 FPM, MAJOR FLOW OF WARM AIR SOUNDS OF SOMETHING BECOMING UNPLUGGED. ALL RETURNED TO NORMAL WITHIN 2 MINUTES. CABIN ALTITUDE SETTLED AT 7500. MAINTENANCE INTERROGATED CDS. NO CURRENT FAULTS FOUND. C/W FIM TASK 21-30-810-801. C/W FUNCTIONAL TEST OF PRESS CONTROL. NO DEFECTS NOTED. ABD CDS SHOWS NO RELATED STATUS MESSAGES. NO PARTS REPLACED AND AIRCRAFT RETURNED TO SERVICE.