“Clear Air Turbulence” is Hong Kong-based British artist Simon Birch’s monumental sculptural installation at his “14th Factory” exhibition in Los Angeles. The artwork is a rectangular black pool planted with the wings and tail fins salvaged from various old airplanes parked out in the Mojave desert at the so-called “airplane graveyard.” At first glance, these aircraft parts appear like the fins of giant sharks or whales lurking just beneath the surface of the water.