iPadOS 13.1 (build 17A5837a) is an official Apple over-the-air update for the iPad Air 3 (WiFi), released on 2019-09-10T20:11:49Z. The update package is 210.45 MB. This is a delta (partial) update that requires 13.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 66f9b5773dbd0510f6b68b0627d6b9044a1ce38a.zip.