THE VICTIM APPARENTLY REMOVED HIMSELF FROM THE OPERATOR'S COMPARTMENT OF THE LONG AIRDOX NO. 3 MBC AND RECEIVED FATAL CRUSHING INJURIES WHEN HEWAS CAUGHT BETWEEN THE MACHINE OPERATOR'S COMPAR TMENT CANOPY AND THE COAL RIB. THE ACCIDENT OCCURRED AS THE MOBILE BRIDGE CONVEYOR WAS BEING SETUP TO MINE IN THE NO. 4 FACE.