iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2016-03-31T16:54:11Z. The update package is 1.12 GB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 37702f1792dd9d06bc8c78ff1b14aa6b122c79a5.zip.