Definition
The point on the downwind leg of the traffic pattern, abeam the intended touchdown point, at which the pilot reduces power to idle to begin a 180° power-off approach. From this position, the pilot judges altitude, distance, and wind to plan the gliding turn through base to final without adding power.
Plain English
It's the spot on downwind, level with where you plan to land, where you pull the power to idle and start the glide down to the runway. From here on, you're flying the airplane to the touchdown point using only what altitude and energy you already have.
Context Anchor
Used during the 180° power-off approach, especially when flying downwind beside the runway and preparing to glide to the landing point without engine power.
Derivation
Key' here means a reference point that unlocks the rest of the maneuver — once you reach it, every decision that follows (when to turn base, how steep, when to turn final) flows from what you saw and felt at that point. 'Downwind' identifies which leg of the traffic pattern it's on.
Why Pilots Care
Reaching this position at the proper altitude and distance lets the pilot judge the turn timing and descent rate needed to land safely without power.
Grounding Statement
At this point, the pilot looks at the runway from beside it and decides whether the glide to the chosen landing spot is likely to work.
Intuition Check
“Key position” does not mean a marked spot on the ground. It means a judging point in the traffic pattern that helps the pilot decide whether the approach is on target.
Example Sentence 1
Abeam the numbers at pattern altitude, he reached the downwind key position, pulled the throttle to idle, and began his glide to the runway.
Example Sentence 2
If the airplane is too high when it arrives at the downwind key position, the pilot can slip or use flaps to adjust the glide path.