The requirement of section 382.95(b) of this part to provide boarding and deplaning assistance through the use of lifts applies with respect to all aircraft with a passenger capacity of 19 or more, with the following exceptions:
(a) Float planes;
(b) The following 19-seat capacity aircraft models: the Fairchild Metro, the Jetstream 31 and 32, the Beech 1900 (C and D models), and the Embraer EMB-120;
(c) Any other aircraft model determined by the Department of Transportation to be unsuitable for boarding and deplaning assistance by lift, ramp, or other suitable device.
The Department will make such a determination if it concludes that—
(1) No existing boarding and deplaning assistance device on the market will accommodate the aircraft without a significant risk of serious damage to the aircraft or injury to passengers or employees, or
(2) Internal barriers are present in the aircraft that would preclude passengers who use a boarding or aisle chair from reaching a non-exit row seat.