FIG. 1 is a front view of an access panel showing my new design; FIG. 2 is a left side view thereof; FIG. 3 is a right side view thereof; FIG. 4 is a top side view thereof; FIG. 5 is a bottom side view thereof; FIG. 6 is a back view thereof; and, FIG. 7 is an oblique perspective view thereof.