The failure of each pilot-in-command to maintain visual lookout. Factors were: the lack of each pilot-in-command obtaining/maintaining communication with the control tower, and inadequate lookout by each pilot-rated passenger, the inadequate procedures/directives by the biplane association management and the airport management, and inadequate supervision by the Federal Aviation Administration.

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE DUE TO GUSTING WIND CONDITIONS. THE PILOT DID NOT ADEQUATELY CORRECT THE SITUATION BEFORE THE AIRPLANE TRAVELED INTO SOFT TERRAIN.