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:

Meet the eligibility requirements of § 61.153 of this part;

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

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

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

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

Airplane category rating with a single-engine class rating. A person applying for an airline transport certificate with an airplane category and single-engine class rating who holds an airline transport pilot certificate with another aircraft category rating must:

Meet the eligibility requirements of § 61.153 of this part;

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

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

Meet the applicable aeronautical experience requirements of § 61.159 of this part; and

Pass the practical test on the areas of operation of § 61.157(e)(1) of this part.

Airplane category rating with a multiengine class rating. A person applying for an airline transport certificate with an airplane category and multiengine class rating who holds an airline transport certificate with another aircraft category rating must:

Meet the eligibility requirements of § 61.153 of this part;

After July 31, 2014, successfully complete the airline transport pilot certification training program specified in § 61.156;

Pass a knowledge test for an airplane category multiengine class rating or type rating on the aeronautical knowledge areas of § 61.155(c);

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

Meet the aeronautical experience requirements of § 61.159 or § 61.160; and

Pass the practical test on the areas of operation of § 61.157(e)(2) of this part.

Powered-lift category. A person applying for an airline transport pilot certificate with a powered-lift category rating who holds an airline transport certificate with another aircraft category rating must:

Meet the eligibility requirements of § 61.153 of this part;

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

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

Meet the applicable aeronautical experience requirements of § 61.163 of this part; and

Pass the required practical test on the areas of operation of § 61.157(e)(3) of this part.

Additional class rating within the same aircraft category. Except as provided in paragraph (f) of this section, a person applying for an airline transport pilot certificate with an additional class rating who holds an airline transport certificate in the same aircraft category must—

Meet the eligibility requirements of § 61.153, except paragraph (g) of that section;

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

Meet the applicable aeronautical experience requirements of subpart G of this part; and

Pass a practical test on the areas of operation of § 61.157(e) appropriate to the aircraft rating sought.

Adding a multiengine class rating or airplane type rating to an airline transport pilot certificate with a single engine class rating. A person applying to add a multiengine class rating or airplane type rating to an airline transport pilot certificate with an airplane category single engine class rating must—

Meet the eligibility requirements of § 61.153;

After July 31, 2014, pass a required knowledge test on the aeronautical knowledge areas of § 61.155(c), as applicable to multiengine airplanes; unless a pilot can present valid airline transport pilot knowledge test results from a test taken prior to August 1, 2014.

Comply with the requirements in § 61.157(b), if applicable;

Meet the applicable aeronautical experience requirements of § 61.159; and

Pass a practical test on the areas of operation of § 61.157(e)(2).

Category class ratings for the operation of aircraft with experimental certificates. Notwithstanding the provisions of paragraphs (a) through (f) of this section, a person holding an airline transport certificate may apply for a category and class rating limited to a specific make and model of experimental aircraft, provided—

The person has logged at least 5 hours flight time while acting as pilot in command in the same category, class, make, and model of aircraft that has been issued an experimental certificate;

The person has received a logbook endorsement from an authorized instructor who has determined that he or she is proficient to act as pilot in command of the same category, class, make, and model of aircraft for which application is made; and

The flight time specified in paragraph (g)(1) of this section must be logged between September 1, 2004 and August 31, 2005.