In disposing of excess aircraft parts, the GSA FAS office in your region:
Because of the critical nature of the failure of aircraft parts and the resulting potential safety threat, recipients of aircraft parts must ensure that any parts installed on an aircraft meet applicable Federal Aviation Administration (FAA) requirements and must obtain required certifications. GSA makes no representation as to a part's conformance with the FAA requirements.
41 C.F.R. §102-33.340