iPadOS 9.9.11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2017-10-23T17:04:16Z. The update package is 1.33 GB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0688f8e08d09763450d9743199dcfeb84bb30a1d.zip.