14 C.F.R. § 61.156
A person who applies for the knowledge test for an airline transport pilot certificate with an airplane category multiengine class rating must present a graduation certificate from an authorized training provider under part 121, 135, 141, or 142 of this chapter certifying the applicant has completed the following training in a course approved by the Administrator.
(a) Academic training. The applicant for the knowledge test must receive at least 30 hours of classroom instruction that includes the following:
(3) At least 14 hours of instruction on air carrier operations, including the following areas:
(b) FSTD training. The applicant for the knowledge test must receive at least 10 hours of training in a flight simulation training device qualified under part 60 of this chapter that represents a multiengine turbine airplane. The training must include the following:
(1) At least 6 hours of training in a Level C or higher full flight simulator qualified under part 60 of this chapter that represents a multiengine turbine airplane with a maximum takeoff weight of 40,000 pounds or greater. The training must include the following areas:
(2) The remaining FSTD training may be completed in a Level 4 or higher flight simulation training device. The training must include the following areas:
[Docket FAA-2010-0100, 78 FR 42375, July 15, 2013, as amended by Amdt. 61-149, 86 FR 62087, Nov. 9, 2021]