In general, airlines are responsible for accidents and injuries that occur on their planes. Similarly, airports are responsible for accidents in the airport itself or on the tarmac that are caused by their own negligence.
It is especially important to contact legal counsel if you have been injured while at an airport because there are so many parties at play. Businesses, contractors and sub-contractors, government entities, and other agencies can all factor into who is liable for your injury. Your case requires careful investigation by qualified legal counsel that can determine the responsible parties in our case.