A typical IFR clearance from a non-towered airport will usually go something like this: “N12345 is cleared to Podunk Airport via runway heading to 2000 then as filed. Climb and maintain 5000; expect 10,000 one-zero minutes after departure. Contact center on 123.45; squawk 1234. Time now:1620. Clearance void if not off by 1630. If not off by 1630, advise intentions by 1640. You’re released.” That gives you 10 minutes to get airborne. Is that enough? What does “off” mean? What if it takes you 12 minutes to take off after being released? What will ATC do?
Is Busting a Void Time A BIG Deal?
A typical IFR clearance from a non-towered airport will usually go something like this: N12345 is cleared to Podunk Airport via runway heading to 2000 then as filed. Climb and maintain 5000; expect 10,000 one-zero minutes after departure. Contact center on 123.45; squawk 1234. Time now:1620. Clearance void if not off by 1630. If not off by 1630, advise intentions by 1640. Youre released. That gives you 10 minutes to get airborne. Is that enough? What does off mean? What if it takes you 12 minutes to take off after being released? What will ATC do?
Key Takeaways:
- IFR clearances from non-towered airports include a "clearance void time" (takeoff deadline) and an "advise intentions by" time (a buffer for reporting airborne).
- The initial void time can be challenging as ATC cannot monitor non-towered departures, and pilots need time to get airborne, climb, and establish communication.
- Pilots should request clearance only when fully prepared for departure, or proactively ask for a later void time if the given window is insufficient, to ensure compliance.
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