What is the requirement for VOR testing?

The VOR (VHF Omnidirectional Range) testing requirement is that it must be done every 30 days. This ensures that the VOR navigation equipment on an aircraft is functioning properly and providing accurate guidance for navigation. The 30-day interval is set by the FAA regulations to maintain safety standards and ensure that pilots can rely on the VOR signals for navigation during flight. Regular testing assists in confirming the VOR's reliability, contributing to overall flight safety.

In practice, this testing involves checking the VOR against a known reference or through a procedure, ensuring accuracy within specified tolerances. While other intervals such as 60 days or yearly maintenance practices exist for different systems or equipment checks, the specific 30-day requirement applies solely to VOR testing to guarantee proper navigational accuracy in a timely manner.