iPadOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2019-07-09T17:15:48Z. The update package is 280.06 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e293edec710834bb7808f4c517b52e673bcbff2e.zip.