As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1090, CMH-JFK, AMS CTRL FAIL CAS MESSAGE APPLIED AT FL350 WITH CLOSURE OF BOTH BLEEDS AND PACKS ON THE ECS SYS PAGE. PRESSURES IN CABIN STARTED CLIMBING FROM 800-1000 FPM. AN EMERGENCY DESCENT WAS STARTED TO 10000 FEET. PRESSURE NEVER RETURNED. TROUBLESHOT SYS PER FIM TASK 21-00-00-810-805A. FOUND AMS FAILURE: FAULT CODES 21001510AM1 & 21001510AM2. CONTROL PROCESSOR AT FAULT. REMOVED AND REPLACED BOTH AMS CONTROLLER PROCESSORS AT SPDA 2 SLOTS 18 & 25 PER AMM 21-00-01. CHECK CONFIGURATION AND OPS CHECK NORMAL.