iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2019-12-17T18:12:51Z. The update package is 213.56 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: 7430be0a95d2b2ff2d7dd8df9b4a7ef67ecbf3f4.zip.