What was found
A RUDDER WAS RECEIVED IN OUR WORKSHOP FOR LIGHTNING STRIKE REPAIR. DURING INSPECTION A (WEDGE SHAPED) LOOSE PART WAS FOUND. PART WAS LOCATED ON THE INSIDE OF THE LOWER RIB. WHEN TRYING TO CHECK IF THE PART BELONGED TO THE UNIT AND IF SO, WHERE IT WAS MEANT TO BE INSTALLED INSTALLED, SXV RAN INTO SOME ISSUES. AS THE PART DOES NOT HAVE ANY IDENTIFICATION, SXV CHECKED AVAILABLE SRM AND CMM FOR POSSIBLE OPTIONS. WHILE DOING SO A DISCREPANCY WAS FOUND BETWEEN THE SRM AND THE CMM . PART DOES NOT HAVE ANY FASTENER HOLES, IT APPEARS TO BE GLUED / CURED IN PLACE. BASED ON SRM B787-A-55-40-09-02A-041B-A THE PART SHOULD BE INSTALLED. WHEN CHECKING THE SAME SRM FOR APPLICABLE AIRCRAFT TYPE THE PART IS NOT MENTIONED.CMM 55-40-05, IPL FIG.01 ITEM -225A ALSO SHOWS THE PART AS BEING INSTALLED.