29 CFR 825.803: Special rules for airline flight crew employees, recordkeeping requirements.

(a) Employers of eligible airline flight crew employees shall make, keep, and preserve records in accordance with the requirements of Subpart E of this Part (§ 825.500).

(b) Covered employers of airline flight crew employees are required to maintain certain additional records “on file with the Secretary.” To comply with this requirement, those employers shall maintain:

(1) Records and documents containing information specifying the applicable monthly guarantee with respect to each category of employee to whom such guarantee applies, including copies of any relevant collective bargaining agreements or employer policy documents; and

(2) Records of hours worked and hours paid, as those terms are defined in § 825.801(b)(2).