You never know what type of damage may be suffered in a crash. If the crystal is cracked, the radio won't function at all. A tuning can may have been knocked out of tune, the PC board may be cracked, there may be a loose solder joint. None of these is easily repairable by an amateur. Send the TX and RX in for repair. The repair shop will need the TX to properly tune the RX. Places like that usually don't charge too much.

Dr.1