¶1Sandra C. Midkiff (argued), Pickett & Midkiff, and William H. Pickett, Kansas City, Mo., for appellants; Albert A. Riederer, Kansas City, Mo., of counsel.
¶2Dan G. Jackson, III, Asst. City Atty. (argued), and Aaron A. Wilson, City Atty., Kansas City, Mo., for appellees.
¶3Before LAY, BRIGHT, and HENLEY, Circuit Judges.
¶5In this action brought under 42 U.S.C. §§ 1981, 1983, and 1985 (1970), firefighters of Kansas City, Missouri, ask the court to enjoin the city from promoting certain firefighters, who are members of minority groups, pursuant to the city’s affirmative action plan. They claim that the promotions constitute reverse discrimination and violate their right to equal protection. The district court1 found in favor of the city, and the firefighters appeal. We hold that, because of events occurring since the district court’s decision, the case is now moot.
¶6In July of 1976, four battalion chief positions in the Fire Department became vacant. Pursuant to the city’s affirmative action plan, two of the vacancies were designated “affirmative action,” to be filled by qualified members of minority groups. One of the affirmative action vacancies was filled by an Indian who ranked No.2 on the certification list.2 The other was filled by a *1259black firefighter who ranked No. 10 on the certification list. The firefighters challenge the latter promotion, claiming that it resulted in passing over five whites and one black holding higher positions on the certification list.
¶7The plaintiffs in this action originally consisted of twenty firefighters, their union, and two union officials. The district court found that the only plaintiffs who had standing to maintain the action were John Tvedten, Robert McDonald, James Stevenin, Nathan Friends, and Charles Whitehead, for they held ranks No. 1, 3, 4, 6, and 7, respectively, on the certification list and were passed over for promotion. Of the remaining plaintiffs, two had been promoted to battalion chief and therefore were not injured by the challenged promotion. The remaining individual plaintiffs were not on the certification list; because they were ineligible for the promotion, they, too, were not injured by it. The district court found that neither the union nor the union officials had standing to assert the claims of others concerning the battalion chief promotions.3 Further, the district court denied class certification. The firefighters have not challenged these decisions on appeal.
¶8Since the district court decision, Tvedten, McDonald, Stevenin, Friends, and Whitehead have been promoted to battalion chief. Despite their promotions, they argue that they remain injured by the challenged affirmative action promotion because of loss of seniority. In support, they cite the Memorandum of Understanding between the union and the city. Article III, section 2, of the agreement states:
Seniority for members of the bargaining unit above the rank of FAO [fire apparatus operator] is the employee’s length of continuous service dating from his last date of appointment to his current position.
¶9Thus, they argue, they would have had greater seniority, with its numerous attendant benefits under the Memorandum of Understanding, had they received the July 1976 promotion.
¶10We find this argument unsupported by the record. The Memorandum of Understanding expressly excludes battalion chiefs from the bargaining unit.4 The seniority system established by the Memorandum of Understanding therefore does not benefit these appellants. They have provided us with no other evidence of loss or injury resulting from the 1976 promotion.
¶11No justiciable case or controversy now exists between the city and appellants Tvedten, McDonald, Stevenin, Friends, and Whitehead. The action has, therefore, become moot. See Board of School Commissioners v. Jacobs, 420 U.S. 128, 129, 95 S.Ct. 848, 43 L.Ed.2d 74 (1975); DeFunis v. Ode-*1260gaard, 416 U.S. 312, 94 S.Ct. 1704, 40 L.Ed.2d 164 (1974); Hall v. Beals, 396 U.S. 45, 90 S.Ct. 200, 24 L.Ed.2d 214 (1969).5
¶12The judgment of the district court is vacated and the case is remanded to the district court with directions to dismiss the cause as moot.