As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS BOTH PACKS FAILED AT FL 40. PERFORMED EMERGENCY DESCENT. MASKED DROPPED AND WERE USED BY APPROXIMATELY 78 PAX AND CREW. REPLACED COCKPIT CABIN CONTROL PANEL FOR MANUAL CONTROL PROBLEM. PERFORMED BITE ON BOTH L/AUTO PRESSURE CONTROLLERS OK. PRESSURIZED A/C OK WITH LT PA AIRCRAFT OK FOR SERVICE.