iPadOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2015-09-16T18:02:13Z. The update package is 1.15 GB. This is a delta (partial) update that requires 8.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2edda02e8390b1ecf0a0a8922fb2ef7bbc121396.zip.