As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 240, CABIN PRESSURE WARNING. CABIN ALTITUDE 10000 FT AND CLIMBING. STARTED EMERGENCY DESCENT PASSING 12000 FT, CABIN ALTITUDE BEGAN TO DESEND. AT 10000 FT CABIN DESCENDED TO 800 FT AND HELD. AFTER 15 MINUTES, CABIN ALTITUDE BEGAN TO DESCEND AGAIN. CABIN ALTITUDE LEVELED AT 4000 FT. FLIGHT CONTINUED AT 10,000 FT. REPLACED AFT OUTFLOW VALVE IAW AMM 21-31-16-000-801 AND 21-31-16-400-801. FUNCTIONAL TESTED GOOD. RETURNED TO SERVICE.