What was found
AIRCRAFT RETURNED TO SDF DUE TO CABIN WILL NOT PRESSURIZE. RADAR SHORTS WITH LOW CABIN PRESSURE. REMOVED AND REPLACED AIRCRAFT CONTROL VALVE. OK TO DEFER FOR MEL 34.8. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT RETURNED TO SDF DUE TO CABIN WILL NOT PRESSURIZE. RADAR SHORTS WITH LOW CABIN PRESSURE. REMOVED AND REPLACED AIRCRAFT CONTROL VALVE. OK TO DEFER FOR MEL 34.8. (X)