What was found
TWO HOURS INTO CRUISE AT FL 350 ENCOUNTERED A LOSS OF CABIN PRESSURE. RAN COM PROCEDURES CABIN ALTITUDE WARNING/RAPID DEPRESSURIZATION. CABIN RECOVERED AND HELD AT 8500 FEET FOR ABOUT 20 MIN BEFORE A RAPID SPIKE IN CABIN CLIMB (FULL SCALE) INITIATED AN EMERGENCY DESCENT WITH ATC. CABIN DID NOT RECOVER FOR REMAINDER OF FLIGHT. DIVERTED TO KABQ. CORRECTIVE ACTION - LOG PAGE 78763 - 11/23/2025 - DURING TROUBLESHOOTING FOUND RH TEMP CONTROL VALVE STUCK IN FULL HEAT POSITION CAUSING RH AIR CONDITIIONING SYSTEM TO OVERHEAT AND SHUT DOWN. REPLACED RH TEMP CONTROL VALVE PER AMM 21-61-1; TESTED PER 21-61-1 OPS CHECK GOOD. PERFORMED CABIN PRESSURE CONTROL SYSTEMS PER AMM 21-32-0 3(A) OPS CHECK GOOD.