iPadOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPad Air 3 (WiFi), released on 2019-04-29T17:35:20Z. The update package is 144.85 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: 8c639802b74152a3f8269a7e0334a795ed0dd9f0.zip.