49 CFR Part 27 - Nondiscrimination on the Basis of Disability in Programs or Activities Receiving Federal Financial Assistance (with amendments issued through Aug. 2015)

(e) Boarding assistance agreements required in paragraphs (c) and (d) of this section are not required to apply to the following situations:

(1) Access to float planes;

(2) Access to 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;

(3) Access to 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—

(i) No existing boarding and deplaning assistance device on the market will accommodate the aircraft without significant risk of serious damage to the aircraft or injury to passengers or employees, or

(ii) 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.