MEMORANDUM **

Rico Duran Mayo appeals pro se from the district court’s order denying his 18 U.S.C. § 3582(c)(2) motion for reduction of sentence. We have jurisdiction under 28 U.S.C. § 1291, and we affirm.

Mayo contends that he is entitled to a sentence reduction under the Fair Sentencing Act of 2010 (“FSA”) and subsequent amendments to the Sentencing Guidelines. He argues that because his conviction under 21 U.S.C. § 844 no longer qualifies as a predicate crime for one of his two convictions under 18 U.S.C. § 924(c), the district court had discretion to dismiss his first section 924(c) conviction and to modify the sentence imposed for his second section 924(c) conviction. We review de novo whether the district court had authority to modify a defendant’s sentence under section 3582(c)(2). See United States v. Austin, 676 F.3d 924, 926 (9th Cir. 2012).

Mayo is not entitled to relief under section 3582(c)(2) because section 3582(c)(2) does not authorize a plenary resentencing proceeding, but only a limited adjustment to an otherwise final sentence when the Guidelines range applicable to a defendant’s sentence has subsequently been lowered. See 18 U.S.C. § 3582(c)(2); Dillon v. United States, 560 U.S. 817, 130 S.Ct. 2683, 2691, 177 L.Ed.2d 271 (2010). Mayo was sentenced in 1998 to the statutory mandatory minimum sentence, and not based on a Guidelines range that was subsequently lowered. Further, any changes made by the FSA do not apply retroactively to defendants, like Mayo, who were sentenced before its effective date. See United States v. Augustine, 712 F.3d 1290, 1295 (9th Cir. 2013).

*441 All pending motions are denied.

AFFIRMED.