Route53 zone-transfers to secondary nameservers?

Unfortunately, AWS currently does not support secondary DNS services and zone transfers. There is already a request for Route 53 to support zone transfer. There is no ETA as AWS does not publicize roadmap items however as soon as it gets released, it should be publicly announced in either one of the following links:

AWS News Blog: https://aws.amazon.com/blogs/aws/ What's New: http://aws.amazon.com/new/

As WernerW mentioned, Route 53 does not support zone transfers.

If you are concerned about availability, Route 53 includes Shuffle Sharing and Anycast to ensure high availability, and comes with 100% SLA.

If you want to keep a copy of your DNS records, you can use AWS CLI (or third party command line tool) to export them. The AWS CLI syntax is as follows

aws route53 list-resource-record-sets --hosted-zone-id "/hostedzone/<YOUR_R53_ID>"

That's true, From AWS PS support team