iPadOS 11.3 (build 15E5201e) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-03-05T18:13:55Z. The update package is 283.16 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: 8193ce20d37858c40cc9f9404f6c408a72868fa9.zip.