iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2019-01-22T18:03:57Z. The update package is 357.34 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 94f01477391d2c8a4e644574347c917bf4b75612.zip.