The ornamental design for an airfieldlightingfixture, as shown and described.
FIG. 1 is a perspective view of the airfield lighting fixture showing our new design;
FIG. 2 is a right side view thereof, a left view being a mirror image thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The broken lines in the drawings are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.