iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-03-29T17:10:13Z. The update package is 584.79 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1c49a0b78fdf732dd2d863e3718972404e6cec6d.zip.