When trying to load an image from tftp on your computer, the lightweight AP reverts its interfaces to DHCP because it is not able to find a controller.
This happen when either archive download-sw or ordinary copy tftp flash
It gives off the following error CAPWAP-3-STATIC_TO_DHCP_IP: Could not discover WLC using static IP. Forcing AP to use DHCP

This can be remedied by the following commands

capwap ap ip address 10.10.10.2 255.255.255.0
capwap ap ip default-gateway 10.10.10.1 (Your TFTP server/PC)

What you will find then, is the CAP will still search for a controller, but will be more or less stuck on Translating “CISCO-CAPWAP-CONTROLLER”…domain server (255.255.255.255) providing you with sufficient time to transfer your autonomous image.