iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2016-03-31T16:52:39Z. The update package is 418.97 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 66cb77883ad257eac57b6763d044c68a34931eb9.zip.