If you must descend at the IAF on a procedure track, when should you begin your descent?

If you must descend at the IAF on a procedure track, when should you begin your descent?

• A. Abeam the IAF going outbound and you have crossed over the IAF
• B. Over the IAF inbound
• C. At the IAF altitude
• D. After passing the FAF

Answer: (A)

When you’re descending on the initial approach segment, you do it at a point where you’re still within the protected airspace for that segment. If you must descend on the procedure track, the descent should begin after you have crossed over the IAF and are abeam it on the outbound course. That places you on the outbound leg within the published protection, allowing you to descend to the intermediate altitude and then continue the approach as published. Starting the descent earlier—while still inbound to the IAF, exactly at the IAF, or only after the FAF—can put you outside the protected area or violate published altitude restrictions, increasing risk of terrain or obstacle conflicts.

When you’re descending on the initial approach segment, you do it at a point where you’re still within the protected airspace for that segment. If you must descend on the procedure track, the descent should begin after you have crossed over the IAF and are abeam it on the outbound course. That places you on the outbound leg within the published protection, allowing you to descend to the intermediate altitude and then continue the approach as published.

Starting the descent earlier—while still inbound to the IAF, exactly at the IAF, or only after the FAF—can put you outside the protected area or violate published altitude restrictions, increasing risk of terrain or obstacle conflicts.