What was found
WHILE USING RUDDER STEERING HEARD LOUD SNAP AND LOST ALL STEERING CONTROL. NOTICED C ATM PRESS ZERO. FOUND BROKEN RUDDER CONTROL CABLE. CAUSE OF FAILURE UNDER INVESTIGATION. REMOVED AND REPLACED RUDDER CONTROL CABLE IAW M/M 27-21-00, OPS CHECKED NORMAL. THIS CABLE FAILED AS A RESULT OF EXPOSURE TO A HIGH CHLORINE AND SULFUR CONTAINING MEDIA AT TIMES. THIS RESULTED IN A CORROSION FAILURE OF MANY OF THE WIRES. THE CONTAMINATION SEEMS LIMITED TO AN 18 TO 24 AREA. AS NO CORROSION PRODUCT WAS FOUND ON THE FATIGUE PORTION OF THE CABLE INDICATES THAT WHATEVER THE SOURCE WAS, IT WAS NOT PRESENT TOWARD THE END LIFE OF THE CABLE. IT IS POSSIBLE THAT THE CORROSIVE MEDIA IS INTERMITTENT IN NATURE.