THE UNITED STATES MARINE CORPS (USMC) HAS A REQUIREMENT TO INSPECT THE CLEVISES AND REMOVE/REPLACE THE ELEVATION PIVOT BOLTS ON THE ENTIRE FLEET OF HIGH MOBILITY ARTILLERY ROCKET SYSTEMS (HIMARS) VEHICLES. IN THE FALL OF 2014, CRACKS WERE DISCOVERED ON THREE ARMY LAUNCHERS. AN INVESTIGATION LED BY PRECISION FIRES ROCKET AND MISSILE SYSTEMS (PFRMS) WAS CONDUCTED THROUGH THE REMAINDER OF 2014 AND INTO 2015. THE INVESTIGATION TEAM INCLUDED THE PROTOTYPE INTEGRATION FACILITY (PIF) AND THE HIMARS MANUFACTURER, LOCKHEED MARTIN. THE ROOT CAUSE OF THE CRACKING WAS DETERMINED AND A PIF DESIGN MODIFICATION TO THE PIVOT BOLT IS BEING IMPLEMENTED TO CORRECT THE ISSUE. THE PIF HAS BEEN ASKED TO INSPECT AND RETROFIT THE USMC LAUNCHER FLEET.