iPadOS 9.3 (build 13E237) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2016-03-28T16:51:24Z. The update package is 1.15 GB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ac34fdfc33075062f7900c6dbaa488fa905c226c.zip.