iPadOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2019-05-28T17:07:10Z. The update package is 197.06 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 64b8cd23396698dad4e1064acd5041bdf94fc608.zip.