What was found
EQUIP COOLING OVBD VALVE FAILED TO CLOSE, COULD NOT PRESSURIZE CABIN. *S/D* REPLACED AIRFLOW SENSOR DET MM 21-23-00. REMOVED AND REPLACED COOLING OVBD EXTRACTION VALVE MM 21-23-13.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
EQUIP COOLING OVBD VALVE FAILED TO CLOSE, COULD NOT PRESSURIZE CABIN. *S/D* REPLACED AIRFLOW SENSOR DET MM 21-23-00. REMOVED AND REPLACED COOLING OVBD EXTRACTION VALVE MM 21-23-13.