In re Ellis, ___ F.3d ___ (9th Cir. Feb. 04, 2004) (district court lacks sua sponte authority to vacate a previously entered and accepted guilty plea; upon rejecting the plea agreement, the only course available for the district court under FRCP rule 11 is to advise the defendant of his rights, including the right to withdraw the guilty plea).
http://caselaw.findlaw.com/data2/circs/9th/0170724p.pdf