What was found
THE NR 3 CYLINDER EXHAUST ROCKER ARM RETAINING NUT BECAME LOOSE, REDUCING LIFT ON THE EXHAUST VALVE, NOT ALLOWING SUFFICIENT AIR TO EXIT THE CYLINDER. PRESSURE IN THE CYLINDER EXCEDED THE STRENGTH OF THE INTAKE VALVE SYSTEM TO OPEN, CAUSING THE INTAKE PUSHROD TO FALL (BEND). RECOMMEND A SIMPLE LOCKPLATE BE ADDED UNDER THE ROCKER ARM RETAINING NUT WITH A LOCK TAB TO ELIMINATE THIS POSSIBLE FAILURE. (K)