What was found
AIR TURNBACK/DECLARED EMERGENCY, FL 210 RECEIVED CABIN ALTITUDE WARNING HORN, RED CABIN ALTITUDE LIGHT EMERGENCY DESCENT INITIATED. R&R PRESSURE CONTROL PANEL PER AMM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURNBACK/DECLARED EMERGENCY, FL 210 RECEIVED CABIN ALTITUDE WARNING HORN, RED CABIN ALTITUDE LIGHT EMERGENCY DESCENT INITIATED. R&R PRESSURE CONTROL PANEL PER AMM.