iPadOS 13.4 (build 17E5255a) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2020-03-10T17:20:52Z. The update package is 104.75 MB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9d1848db10c5d40a8d15f69cfb1534e5265f16be.zip.