What was found
A BACKED OUT ROCKER COVER SCREW WAS NOTICED AND A CHECK OF ALL ROCKER SCREWS REVEALED THAT MOST HAD A TOTAL LOSS OF TORQUE, WITH THE REMAINING HAVING NEARLY A TOTAL LOSS. GASKETS WERE INSTALLED 7 HOURS EARLIER WITH NEW SCREWS, WASHERS AND LOCKWASHERS. GASKETS WERE INSTALLED AT THE TORQUE OF 25 LBS AS PER INSTALLATION INSTRUCTIONS. INSPECTION OF THE GASKETS SHOWED NO VISIBLE DEFECTS. GASKETS MUST HAVE RELAXED DURING THE SHORT TIME IN SERVICE CAUSING A LOSS IN TORQUE. LOCKWASHERS ALONE ARE NOT ADEQUATE.