Altimeter Instrument Flight Rules Transponder 
Pilot Institute
NOVEMBER 30, 2024
V – VOR Check If you’re flying under Instrument Flight Rules (IFR), your VOR navigation equipment must be tested every 30 days. T – Transponder Check Your transponder, which helps air traffic control see your airplane on radar, needs to be inspected every 24 months. Why Is AVIATES Important?
Pilot Institute
JULY 9, 2025
Transponder, Altimeter, and Pitot-Static Inspections Under Instrument Flight Rules (IFR), you must have your altimeter, static system, and automatic altitude reporting system tested every 24 calendar months. This should be done by an authorized repair station.
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Northstar VFR
AUGUST 25, 2024
The list of inspections gets longer if the aircraft is for compensation/for hire, or if flown under instrument flight rules (IFR). There are a few exceptions when the aircraft can be flown outside of this timeframe, such as when a special flight permit is issued. There are also required inspections for civil aircraft.
Pilot Institute
APRIL 24, 2024
Class B airspace is also charted on VFR Sectionals and instrument flight rules (IFR) Enroute Low Altitude charts. All aircraft inside the veil must have an operating Mode C transponder and ADS-B Out. Regardless of flight rules, you must meet the equipment requirements before entering. Just fly under a shelf!
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