Broken AirPod

Hmm, I guess it depends on what Apple class as accidental. Here is the UK page that covers this: AirPods Repair – Official Apple Support.

tt2

Use the serial number to look up your coverage:

APPLE CARE COVERAGE 

https://checkcoverage.apple.com/ca/en/;jsessionid=node01k2hqbjcw34toll9gmrkt00258630502.node0

Or just call Apple support to ask