I'd be interested in seeing your citation for this "clear violation".
If you're going to sue, you might want to get your statutes straight.
The Americans with Disabilities Act Title I is about employment and covers employers with 15 or more employees. Enforcement is effected by filing complaints with the U. S. Equal Employment Opportunity Commission (EEOC).
ADA Title II covers public transportation, but
not air travel. Complaints go to the Office of Civil Rights, Federal Transit Administration, U.S. Department of Transportation.
ADA Title III covers businesses and nonprofit service providers that are public accommodations, including restaurants, retail stores, hotels, movie theaters, private schools, convention centers, doctors' offices, homeless shelters, transportation depots, zoos, funeral homes, day care centers, and recreation facilities including sports stadiums and fitness clubs. So this includes airports but not airplanes. Title III complaints are filed with the Department of Justice.
The Americans with Disabilities Act has no provisions of any kind regarding water, hydration, or nourishment. Here is the
full text of the Act.
Airlines are covered by the Air Carrier Access Act (14 C.F.R. Part 382), which is not a part of the Americans with Disabilities Act. It doesn't talk about nourishment or hydration either, as its function is to provide equal
access. It talks about things like boarding, lavatories, equal access to information, seating accomodations, and attendents. Here is
the text of the Act.
ETA: I do not post this because I support the TSA ban on liquids, but because I get very tired of people citing the ADA and ACAA when they clearly are unfamiliar with either act. It makes it more difficult for those who need the protections of these acts to even get what the act provides.