iPadOS 11.3 (build 15E5201e) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2018-03-05T18:13:49Z. The update package is 259.47 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2ab7054fe8ce0b5f6634453b3af4a0cca0c66fe0.zip.