What was found
CABIN ALTITUDE ROSE RAPIDLY AT CRUISE (FLIGHT LEVEL 240) ECEEDED 10000 THEN DURING DECENT IT REACHED AS HIGH AS 12000 CABIN ALTITUDE HISTORY: NONE FACT 22MAY23 17:39 PHL REMOVED AND REPLACED CABIN PRESSURE ACUISITION MODULE IAW AMM 21-32-01 OPS/ LEAK CHECK GOOD. OK FOR SERVICE MDIS 643 21-31 2778333 22MAY23 PHL CLOSE CABIN ALT ROSE RAPIDLY AT CRUISE (FL240). EXCEEDED 10,000 THEN DURING EMERGENCY DESCENT IT REACHED AS HIGH AS 12,200 (CAB ALT). REF SEQ 1 THIS LP. MX ACTION COMPLETE SUBJECT TO SATISFACTORY EVALUATION FLIGHT.