Terry Lee Scott, federal prisoner # 62305-079, appeals the district court’s dismissal of his 28 U.S.C. § 2241 petition challenging the sentence imposed following his guilty-plea conviction for conspiracy to possess with intent to distribute cocaine and crack cocaine.

Scott argues under United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), that his sentence violated the Sixth Amendment because it was enhanced based upon facts found by a judge. The decision in Booker does not apply retroactively to cases on collateral review, and a Booker claim does not satisfy the test for filing a § 2241 petition under the savings clause of 28 U.S.C. § 2255. *378 Padilla v. United States, 416 F.3d 424, 427 (5th Cir. 2005).

For the first time on appeal, Scott raises a factual challenge to the district court’s application of a four-level enhancement for his being a leader or organizer of the criminal activity. This newly raised factual claim is not reviewable for the first time on appeal. See Leverette v. Louisville Ladder Co., 183 F.3d 339, 342 (5th Cir. 1999).

AFFIRMED.