As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2232 (PDX-YVR) - LOSS OF PRESSURE AND CABIN PRESSURE WARNING AT 17,000 FEET. COMPLIED WITH A QUICK DESCENT AND LANDING AT SEA. FOUND A 2 INCH AREA OF SEAL MISSING FROM THE AFT CARGO DOOR. REPLACED SEAL. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.