As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2223 CLIMBING THROUGH 18K, GOT A RAPID DECOMPRESSION. THE PRESSURE LOSS SOUND CAME FROM THE FORWARD OUTFLOW VALVE AREA. DIFFERENTIAL PSI WAS APPROXIMATELY 5.1PSID. THERE WAS AN BURNING SMELL AT THE SAME TIME THAT DISSIPATES AS PRESSURE LATER STABILIZED AT 4.0PSID, MAINTENANCE REPLACED HPSON. AIRCRAFT RELEASED FOR TEST FLIGHT. TEST FLIGHT SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.