What was found
(CAN) WHILE CARRYING OUT A ROUTINE INSPECTION (PHASE C6-1200HRS) ON THE HORIZONTAL STABILIZER "GUSSET" A CRACK WAS DISCOVERED IN THE GUSSET ERNINATING FROM THE EDGE OF THE LIGHTENING HOLE. THE INSPECTION SPECIFIES SCRUTINY OF THESEGUSSETS FOR CRACKS ON AIRCRAFT THAT DID NOT INCORPORATE AN EXTRA DOUBLER INSTALLED PER SSK 954. THIS AIRCRAFT DID NOT INCORPORATE THE DOUBLER. THE CRACK IS SMALL (.141 INCH LONG AND DIFFICULT TO SEE. IT WAS CONFIRMED USING HIGH FREQUENCY EDDY CURRENT. THERE IS A SMALL SCRATCH ON THE WEB OF THE GUSSET AT THE CRACK SITE. THE STABILIZER WAS REMOVED TO INSTALL LEAR SPECIAL SERVICES KIT 954 IN PLACE OF THE CRACKED GUSSET.