As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE BASE VISIT INSPECTION FOUND THE WASTE DRAIN VALVE SUPPORT INSIDE ACCESS DOOR 272AR TO BE CORRODED. THE ACFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED DRAIN SUPPORT IAW SRM51-40-02. THE AIRCRAFT WAS RETURNED TO SERVICE.