Better keep your fingers crossed that your new iPad Air doesn't break because if it does, it'll be tough to repair it on your own. Teardown specialist iFixit got their hands on the new slim tablet, tore into it with reckless abandon (ok, maybe not so reckless) and gave it a repairability score of two out of 10 (10 being the easiest to fix).
The team found that, just like with previous iPads, the front panel is glued to the rest of the device which greatly increases the chances of breaking the glass during repair. Furthermore, the LCD has sticky foam tape adhering it to the front panel, increasing the chances of shattering it during disassembly. You also can't access the front panel's connector until you remove the LCD.
Once inside, there is gobs and gobs of adhesive holding everything in place. iFixit said this was the most difficult battery removal procedure they've seen in an iPad to date.
On the positive side, the team found the LCD was easy to remove once the front panel had been taken off. What's more, the battery is not soldered to the logic board so replacing it will be a little bit easier in that regard. Just be careful when doing so as it's extremely thin and apparently, very flexible. There's not much good that can happen when a battery gets warped or punctured.
Given the poor repairability score, you're likely best off taking the iPad Air to an Apple Store or other authorized repair shop should something need replacing.