What was found
DURING THE TORQUE SEQUENCE FOR THE ENG O/H FINAL ASSY, FASTENERS ON THE ENG CASE WERE BROUGHT TO HALF THEIR FINAL TORQUE VALUES WITHOUT ISSUE IAW THE CURRENT MM AND PERTINENT SB`S. THEN WHILE ATTEMPTING TO REACH FINAL TORQUE VALUES, NOTED THAT MANY OF THE STUDS SEEMED TO BE PULLING FROM THE CASE RATHER THAN REACHING TORQUE. REMOVED A CYLINDER TO INVESTIGATE, WHERE WE DISCOVERED THE STUDS WERE STRETCHING. THEN REMOVED 2 STUDS TO EXAMINE THE THREADS IN THE CASE, NO DAMAGE WAS FOUND AND THE STUDS CENTER PORTIONS WERE OBVIOUSLY ELONGATED AND NARROWED IN THE CENTER. REQUESTS FOR POSSIBLE CAUSE TO THE MFG AND THE OTHER TECH ADVISORS SEEMED TO SPECULATE THAT THE STUDS MAY HAVE BEEN OVERTORQUED AT SOME POINT BRINGING THEM FROM AN ELASTIC STAT TO PLASTIC. (NOTE: THE STUDS WERE STRETCHING BETWEEN 220-350 IN/LBS OF TORQUE, WELL UNDER FINAL TORQUE VALUE).