Fixture provides rotational control of the compressor when inspecting the engine using the rigid or flexible borescope; the fixture mounts on the gear box hub and rotates the pto shaft; dim. 18.000 in. Lg, 2.500 in. W; 2.500 in. H; adapter clamp is 7.000 in. L, 6.500 in. W, 1.500 in. H