What was found
(CAN) DURING THE ROUTINE SSI INSPECTION OF THE APU MOUNT AND STRUCTURE, IT WAS NOTICED THAT THE APU, PN 160371-201, SN 897402, HAD A SIGNIFICANT JAGGED CRACK ON THE FWD FACE OF THE COMBUSTION HOUSING, PN 160184-100, AFT OF THE V-BAND CLAMP WHICH SECURES THE COMBUSTOR TO THE GEARBOX/IMPELLER ASSY. UPON REMOVAL OF THE APU WE NOTICED THAT THE CRACK WAS ACTUALLY A SERIES OF CRACK EXTENDING ALMOST ALL OF THE WAY AROUND THE APU. ALSO AN ADDITIONAL CRACK ABOUT 6-7" LONG WAS FOUND BESIDE THE ORIGINAL CRACK. THE APU WAS REMOVED FROM SERVICE.