FAA Military Competency Practice Exam

When must an operational check on the aircraft VOR equipment be accomplished to operate under IFR?

1. Within the preceding 30 days

2. Within the preceding 60 days

3. Prior to every flight

4. At the discretion of the pilot

The correct answer is: Within the preceding 30 days

An operational check on the aircraft VOR (VHF Omni-directional Range) equipment must be accomplished within the preceding 30 days in order to operate under IFR (Instrument Flight Rules). This requirement ensures that pilots are relying on accurate navigation information when flying in instrument conditions, where visibility may be limited and precise navigation is critical for safety. The regulation mandates this time frame to help maintain consistent operational readiness and reliability of the VOR equipment. A check performed within the last 30 days ensures that the VOR system is functioning correctly, and it helps prevent navigation errors that could arise from malfunctioning equipment. Therefore, adhering to this interval is an important aspect of maintaining proficiency and safety during IFR operations.