§ 61.165 Additional aircraft category and class ratings.

(a) Rotorcraft category and helicopter class rating. A person applying for an airline transport certificate with a rotorcraft category and helicopter class rating who holds an airline transport pilot certificate with another aircraft category rating must:

(1) Meet the eligibility requirements of §61.153 of this part;

(2) Pass a knowledge test on the aeronautical knowledge areas of §61.155(c) of this part;

(3) Comply with the requirements in §61.157(b) of this part, if appropriate;

(4) Meet the applicable aeronautical experience requirements of §61.161 of this part; and

(5) Pass the practical test on the areas of operation of §61.157(e)(4) of this part.

Seems so. That's what I'm getting out of it. Have to be tested on Rotorcraft specific items.