Wake turbulence: landing avoidance
Landing behind a heavy (PHAK ch.14):
- Stay at or above its approach path.
- Touch down beyond its touchdown point.
- Stay clear of the sinking wake (TC AIM AIR 2.9.2).
Special cases (TC AIM AIR 2.9.2):
| Situation | Technique or hazard |
|---|---|
| Cleared to land behind aircraft departing ahead | Touch down before its rotation point |
| Cleared to land behind large aircraft on low or missed approach, same runway | Vortices can sit between its flight path and runway surface |
| Large aircraft on parallel runway under 2,500 ft away | Vortex can drift onto you: stay at or above its final approach path, land beyond its touchdown point if safe |
| Departing aircraft on crossing runway | Note where it rotated |
Crossing-runway departure:
| Rotated | Action |
|---|---|
| Past the intersection | Continue, land before it |
| Before the intersection | Stay above its flight path. Abandon the approach unless landing is assured well before the intersection. |
Dragged-in final:
- Landing beyond a preceding heavy's touchdown point means extending the approach.
- Do not sag below glide path chasing distance. Hold altitude with power until on a normal descent path.
- Most dangerous encounters: last half mile of final.
Go-around: if avoidance impossible, go around (TC AIM AIR 2.9.2, Note 1).
Radio cues:
CAUTION - WAKE TURBULENCEfrom ATC: heads-up only. Avoiding the wake stays the pilot's job.- Waiver or ATC clearance never removes the hazard (TC AIM RAC 4.1.1).
- Another aircraft states
HeavyorSuperon initial contact: may need own separation from its wake (NAV CANADA VFR Phraseology, Aircraft Identification).
Trap: the wake sinks; flying below the heavy's path or landing short of its touchdown point puts you into it.
References
- TC AIM AIR 2.9.2
- TC AIM AIR 2.9.2, Note 1
- TC AIM RAC 4.1.1
- PHAK ch.14
- NAV CANADA VFR Phraseology, Aircraft Identification