It may stupid but I was trying to upgrade the IOS image of the AP and I did a wrong manip.
I downloaded the IOS image (ap801-rcvk9w8-tar.124-10b.JA3.tar) from my TFTP server to the flash of the AP. Everything went find so far.
But than I did an archive archive download-sw /overwrite ap801-rcvk9w8-tar.124-10b.JA3.tar and my AP reboot in LWAPP mode.
I should have done: archive download-sw /overwrite tftp://10.0.0.1/ ap801-rcvk9w8-tar.124-10b.JA3.tar instead!
Now I don't how to go back to autonomous mode. archive commando is not available anymore in LWAPP mode.