iPadOS 6.1.3 (build 10B329) is an official Apple over-the-air update for the iPad 2 (WiFi), released on 2014-09-17T17:54:02Z. The update package is 783.13 MB. This is a delta (partial) update that requires 5.0.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: f43aceb9e06c9d1d0fdce491bdc0222093c8b377.zip.