When is an operational check on VOR equipment required when operating under IFR?

An operational check on VOR (VHF Omnidirectional Range) equipment is required within the preceding 30 days when conducting operations under IFR (Instrument Flight Rules). This requirement ensures that the VOR equipment is functioning properly and provides accurate navigation information to pilots, which is critical for safety in IFR operations.

Conducting this check within the specified timeframe helps maintain the reliability and integrity of the navigation system, allowing pilots to confidently navigate through controlled airspace or during instrument approaches. Adhering to this regulation also supports compliance with safety standards set by aviation authorities, reinforcing the importance of operational readiness before engaging in IFR flights.