Definition
A modified approach and landing technique used when wind gusts and turbulence are present, in which the pilot flies the approach at a higher-than-normal airspeed -- typically the manufacturer's recommended turbulent air penetration speed or the normal approach speed plus half the gust factor -- to maintain positive control and provide an adequate margin above stall during sudden airspeed fluctuations. The airplane is flown onto the runway in a level or slightly nose-high attitude rather than held off in a full-stall landing flare.
Plain English
When the air is rough and gusty, the pilot comes in a bit faster than usual so the airplane stays controllable through the bumps, and lands it firmly onto the runway instead of trying to hold it just above the surface for a soft touchdown.
Context Anchor
Encountered during approach planning and final approach when wind, gusts, or rough air make the airplane move around more than normal.
Derivation
Turbulent comes from a Latin word meaning disturbed, confused, or agitated. That fits the aviation meaning: the air is not flowing smoothly, so the airplane may get bumped, lifted, or dropped as it flies through it.
Why Pilots Care
Using the wrong speeds or control technique in turbulent air can cause loss of directional control, a hard landing, or a runway excursion.
Grounding Statement
On final approach in turbulent air, the airplane may suddenly rise, sink, or show quick airspeed changes even though the pilot has not made a large control input.
Intuition Check
Do not think of turbulent air as just an uncomfortable ride. In landing, it can directly affect lift, speed indications, and how accurately the airplane touches down.
Example Sentence 1
With reported gusts of 15 knots, the pilot used a turbulent air approach and landing, adding half the gust factor to the normal approach speed.
Example Sentence 2
After the instructor demonstrated a turbulent air approach and landing, the student practiced maintaining a stable descent path despite the bumps.