When accommodation is impossible, it’s OK to discharge disabled worker

Not every disability can be accommodated in a way that enables an employee to perform the essential functions of his job. Sometimes, the disability simply can’t be accommodated. When that’s the case, you may terminate the employee. If he sues, you must be ready to show what the job’s essential functions are and that it simply isn’t possible for the disabled employee, given his specific disabilities, to perform those functions.