iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2018-03-29T17:05:44Z. The update package is 704.21 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: daae923be0afe740f0cbced70265d28b447f7345.zip.