30 CFR § 27.30
Inspection.
A detailed inspection shall be made by MSHA of the equipment and all
components and functions related to safety in operation, which shall
include:
(a) Examining materials, workmanship, and design to determine
conformance with paragraph (a) of §27.20.
(b) Comparing components and subassemblies with the drawings and
specifications to verify conformance with the requirements of this part.