Certified Flight Instructor (CFI) Practice Exam

What is the requirement for VOR checks for IFR flight?

1. Every 24 calendar months

2. Every 30 days

3. Every 12 calendar months

4. Only when the aircraft is operated for hire

The correct answer is: Every 30 days

The requirement for VOR (VHF Omnidirectional Range) checks for IFR (Instrument Flight Rules) flight is every 30 days. This regulation is critical for ensuring that pilots have accurate navigation information. The VOR system is used for route navigation, and maintaining its accuracy is essential for safe flight operations in instrument meteorological conditions. Pilots must verify the VOR's accuracy within this 30-day period, which can be performed by various methods such as using a VOR test facility, ground check with a known VOR, or a reference from another aircraft. The 30-day requirement ensures that pilots continuously have reliable navigation data, thereby upholding safety and operational integrity in the sky. Regular checks also help maintain pilot proficiency with navigation equipment, an essential skill in IFR flight. The other timelines or conditions referenced, such as 12 calendar months or 24 calendar months, do not meet the immediate safety requirements that the VOR checks are designed to address. Therefore, understanding the necessity for these checks every 30 days is vital for maintaining compliance with IFR regulations and ensuring the safety of flight operations.