Pursuant to 5th Cir. R. 47.5, the court has determined that this opinion should not be published and is not precedent except under the limited circumstances set forth in 5th Cir. R. 47.5.4.

. See Jones-Hailey v. Corp. of TVA, 660 F.Supp. 551, 553 (E.D.Tenn. 1987) (concluding there is no time-limit on motions td1 strike jury demands).

. See Fed.R.Civ.P. 12(f), 39(a) (stating that a court can on its own motion strike pleadings or jury demands).

. See Lehman v. Nakshian, 453 U.S. 156, 160, 101 S.Ct. 2698, 69 L.Ed.2d 548 (1981) (holding that where Congress waives the Government’s immunity, the plaintiff has a right to trial by jury only if that right was "affirmatively and unambiguously granted”); Young v. United States v. Postal Service, 869 F.2d 158, 159 (2d Cir. 1989) (holding that the Postal Service’s "sue and be sued” waiver of immunity does not unambiguously grant a right to jury trial).

. The district court held that immunity prevents estoppel of the Postal Service, citing Office of Personnel Management v. Richmond, 496 U.S. 414, 110 S.Ct. 2465, 110 L.Ed.2d 387 (1990). We do not adopt this rationale, agreeing instead with its alternate finding that the Postal Service made no oral promise on which to base estoppel.