iPadOS 13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2020-01-22T18:06:58Z. The update package is 180.6 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 77e0875202c0dd6d60ed8d6677003f6f5b3113db.zip.