What was found
(CAN) UPON REINSTALLATION OF THE CHIP DETECTOR DRAIN VALVE BODY IN ENGINE NR 1 BEFORE TORQUE VALVE WAS OBTAINED (75 IN LB) , THE NUT PORTION WHICH INCLUDES A RECEPTICLE FOR THE CHIP DETECTOR SEVERED OFF. INSPECTION OF THE PART SHOWED PRESENCE OF PREVIOUS CRACKING AROUND THE RADIUS. THE VALVE BODY WAS REMOVED FROM NR 2 ENGINE AND FOUND IT WAS ALSO CRACKED AROUND THE RADIUS OF THE NUT. THE REMAINING AIRCRAFT IN THE FLEET WILL BE INSPECTED FOR ANY DAMAGE IN THIS AREA.