Florida real estate titans Related Group and Florida East Coast Realty have received dreaded letters of rejection from the Federal Aviation Administration for Miami building plans that failed to meet air traffic safety standards.

Two Related projects in the early planning stages—Auberge Residences and Spa at 1400 Biscayne Blvd. and One Brickell at 444 Brickell Ave.—received letters in August from the FAA telling condo division president Carlos Rosso that both projects were “presumed to be a hazard to air navigation.”