iPadOS 8.3 (build 12F5061) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2015-03-24T16:54:12Z. The update package is 117.55 MB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cff659185514228a192157e78484cdd2fde37929.zip.