iPadOS 8.1.1 (build 12B436) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2014-11-17T18:06:07Z. The update package is 367.04 MB. 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: 82f6f0b49fb1dd370d06cb3dd43574f90b858bc5.zip.