What was found
(CAN) A 6 INCH LONG CRACK FOUND ON TAILBOOM FWD UPPER SKIN UNDER N5 BEARING MOUNT SUPPORT AT BOOM STA A868. TAILBOOM INST IN EUROCOPTER APPRD AS350/355 TAILBOM REPAIR FIXTURE FOR REPL OF UPPER SKIN&FOUND N5SUPPORT HAD BADLY MISALIGN TO FIXTURE: N5 BEARING MOUNT SUPPORT HAD BEEN PREV REPL IN FIELD BY OPERATOR PER EUROCOPTER AS350 REPAIR MANUAL CHAPT 53.10.40.773.A 2ND TAILBOOMN FOUND WITH SIMILAR DEFECT, ALSO N 5 BEARING MOUNT SUPPORT HAD BADLY MISALIGN TO FIXTURE: N5 BEARING MOUNT SUPPORT HAD BEEN PREV REPL IN FIELD.WE FEEL THAT MAIN REASON SKIN CRACKED MISALIGNMENT OF #5 BEARING MOUNT WHICH REPL IN FIELD W/O USE OF FIXTURE: