iPadOS 13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2020-01-22T18:06:57Z. The update package is 180.65 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: 56e79c539ad2eb3f04727f1aa0fb6b2b27616d6a.zip.