iPadOS 13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2020-01-14T18:20:36Z. The update package is 171.38 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8131704d4feacaee35f9f04b117ee2b640758677.zip.