iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2018-03-29T17:05:45Z. The update package is 583.73 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9e6d5667a09efe3a85bceb299f9f0746b60449f7.zip.