Charging Port damanged

Hi

Follow the steps here, including checking the charging port for any debris:

If your iPhone, iPad, or iPod touch won't charge - Apple Support

If the issue persists, contact Apple Support (mail-in service may be available) or make a Genius Bar reservation with a view to having your iPad Air checked and, if recommended by Apple, serviced (whether under warranty or via chargeable repair service):

• Contact - Official Apple Support
• https://twitter.com/applesupport
• http://www.apple.com/retail/geniusbar/

To check your warranty status:

https://checkcoverage.apple.com/