14 CFR § 141.21
Inspections
July 13, 2020
Each holder of a certificate issued under this part must allow the Administrator to inspect its personnel, facilities, equipment, and records to determine the certificate holder's:
(a) Eligibility to hold its certificate;
(b) Compliance with 49 U.S.C. 40101 et seq., formerly the Federal Aviation Act of 1958, as amended; and
(c) Compliance with the Federal Aviation Regulations.