iPadOS 13.4 (build 17E5255a) is an official Apple over-the-air update for the iPad Air 3 (WiFi), released on 2020-03-10T17:20:50Z. The update package is 814.23 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4d76c10f7942c79e241890ffe666e4b19dd5ca57.zip.