iPadOS 13.4 (build 17E5233g) is an official Apple over-the-air update for the iPad Air 3 (WiFi), released on 2020-02-19T18:24:15Z. The update package is 839.08 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: bb5511d45330a58717ec21b0860eb45ea23c90e0.zip.