Narrative:

Was returning part to ZZZ that wasn't used on aircraft. Box was closed with no dangerous paper work on it and didn't realize it was hazardous. It was a flight control unit and didn't know it had a battery in it. Cause: box was closed up and sealed and nothing to alert me that it was hazardous. It was a flight control unit and didn't know it had a battery inside. The part had a [maintenance software company product number] and at the time of the occurrence we were not able to get into [company] software to receive part. Suggestions: [cargo management system] should have a space to put the part number that you are shipping so if it is hazardous it should be flagged as hazardous.

Google
 

Original NASA ASRS Text

Title: Airline Maintenance Personnel reported aircraft part erroneously shipped in unlabeled container.

Narrative: Was returning part to ZZZ that wasn't used on aircraft. Box was closed with no dangerous paper work on it and didn't realize it was hazardous. It was a Flight Control Unit and didn't know it had a battery in it. Cause: box was closed up and sealed and nothing to alert me that it was hazardous. It was a Flight Control Unit and didn't know it had a battery inside. The part had a [maintenance software company product number] and at the time of the occurrence we were not able to get into [company] software to receive part. Suggestions: [cargo management system] should have a space to put the part number that you are shipping so if it is hazardous it should be flagged as hazardous.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.