You are right to be concerned about this. . . . it is most likely that the employee is also covered by the federal
ADA (if your organization has more than 15 employees). In that case, you should talk reasonable accomodation. Leave (above and beyond
FMLA leave) can be a reasonable accommodation so long as it does not place an undue burden on the employer's operations (this is an onerous test, so unless there really is a documented undue burden, I wouldn't advise using this as an exception). Six weeks of leave may or may not be reasonable. You should start a dialogue with the employee and her/his doctor to determine if the employee can return to work sooner with light duty or a modified schedule. Provide the doctor with information regarding the employee's job duties, hours and any physical requirements of the job (essential functions). Document all conversations, suggestions for accommodation and your own rationale for accepting/rejecting any accommodation. Godo luck!