iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-03-29T17:09:24Z. The update package is 1.26 GB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 13469d6040bca79eaa0c54f3f865735fd7d3919b.zip.