Hi
The ASR series of routers are not supported on this community. The following might work though.
If you have IP connectivity between the devices, boot both with the good flash card (one after the other), then on the router with the good card, copy the file(s) to the other router to which you have inserted the bad card. You can format the bad card first if you wish.
The following might help:
http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a00800a6744.shtml#copying_one_router
Hope that helps