iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-03-29T17:10:07Z. The update package is 1.21 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 02b0c734564742515c008426d95be4931658bf27.zip.