FRCP 38: Right to a Jury Trial; Demand
(a) Right Preserved. The right of trial by jury as declared by the Seventh Amendment to the Constitution—or as provided by a federal statute—is preserved to the parties inviolate.
(b) Demand. On any issue triable of right by a jury, a party may demand a jury trial by:
(1) serving the other parties with a written demand—which may be included in a pleading—no later than 14 days after the last pleading directed to the issue is served; and
(2) filing the demand in accordance with Rule 5(d).
(c) Specifying Issues. In its demand, a party may specify the issues that it wishes to have tried by a jury; otherwise, it is considered to have demanded a jury trial on all the issues so triable. If the party has demanded a jury trial on only some issues, any other party may—within 14 days after being served with the demand or within a shorter time ordered by the court—serve a demand for a jury trial on any other or all factual issues triable by jury.
(d) Waiver; Withdrawal. A party waives a jury trial unless its demand is properly served and filed. A proper demand may be withdrawn only if the parties consent.
(e) Admiralty and Maritime Claims. These rules do not create a right to a jury trial on issues in a claim that is an admiralty or maritime claim under Rule 9(h).