iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2018-03-29T17:05:43Z. The update package is 1.24 GB. This is a delta (partial) update that requires 10.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fa9ebe45fbc04975e8f0a5459d22a3c7169b1d45.zip.