What was found
CAPTAIN REPORTED THAT DURING DESCENT, THE CAC R1 WAS DEFERRED AND THE CAC R2 WAS INOPERATIVE. MAINTENANCE PERSONNEL PERFORMED VISUAL INSPECTION OF CAC R2 AREA IAW DMC B787-A-21-51-19-03A-520A, DETECTING A PUNCTURE HOLE ON CAC CASE BODY, AN AIR DUCT BURST AND PRESSURE SENSOR TUBE BROKEN; SO THE CAC R2, AIR DUCTS AND PRESSURE SENSOR TUBE WERE REPLACED IAW DMC B787-A-21-51-19-03A-720A AND CMCF GROUND TEST OF RIGHT CABIN AIR CONDITIONAL TEMP CONTROL SYSTEM TEST AND RIGHT PACK SYSTEM AIR CONDITION TEST WERE PERFORMED IAW DMC B787-21-51-19, TESTED CORRECT.