Final answer:
A VOR check validity depends on regulatory requirements. Results are recorded in maintenance records or logbook.
Step-by-step explanation:
A VOR check is the process of verifying the accuracy of a VOR navigation system, which is used in aviation for navigation purposes. The validity of a VOR check depends on the regulatory requirements of the aviation authority in the country. In the United States, for example, the Federal Aviation Administration (FAA) requires VOR checks to be conducted every 30 days for instrument flight rules (IFR) aircraft and every 60 days for visual flight rules (VFR) aircraft.
The results of a VOR check are recorded in the aircraft's maintenance records or logbook. This is usually done by entering the date, time, the name of the person conducting the check, and the results of the check, which include the observed radial or bearing error.