iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad Air 3 (WiFi), released on 2019-12-17T18:12:50Z. The update package is 205.57 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: 1146f1d8dd4005482d4486585fe98aa6662ad127.zip.