iPadOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2019-04-29T17:35:22Z. The update package is 86.15 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: 81bf454aca8251adf0ecf0930a8761d995a91f4a.zip.