What was found
RETURNING TO MKE. UPON DESCENT TO MKE, CABIN RATE INDICATOR WENT TO 1500 FPM. MASKS DEPLOYED AGAIN -- MTC FOUND LT FLOW CONTROL VALVE INOP. DEFERRED LEFT SYSTEM. RETURNED TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURNING TO MKE. UPON DESCENT TO MKE, CABIN RATE INDICATOR WENT TO 1500 FPM. MASKS DEPLOYED AGAIN -- MTC FOUND LT FLOW CONTROL VALVE INOP. DEFERRED LEFT SYSTEM. RETURNED TO SERVICE.