iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2019-12-17T18:12:54Z. The update package is 182.02 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: cb71d654e148418e6458f8885b90c56c0aba29ed.zip.