This rulemaking would require airlines to take steps to improve the accessibility of lavatories on single-aisle aircraft short of increasing the size of the lavatories. The rulemaking would ensure the accessibility of features within an aircraft lavatory, including but not limited to, toilet seat, assist handles, faucets, flush control, attendant call buttons, lavatory controls and dispensers, lavatory door sill, and door locks. The rulemaking would also consider standards for the on-board wheelchair to improve its safety/maneuverability and easily permit its entry into the aircraft lavatory.