What was found
DURING PRE-FLIGHT VISUAL INSPECTION OF AIRCRAFT A 2.2500 INCH VERTICAL CRACK IN TAIL BOOM SKIN LOCATED ALONG CENTER WATERLINE, 15 INCHES AFT OF THE RT HORIZONTAL STABILIZER TORQUE TUBE WAS FOUND. INSPECTED AREA, FABRICATED TEMPORARY REPAIR IAW MFG CUSTOMER SUPPORT/ENGINEERING DEPARTMENT. FAA SPECIAL FLIGHT PERMIT ATTAINED, AND A FERRY FLIGHT OF AIRCRAFT BACK TO HOME MAINTENANCE FACILITY WAS PERFORMED.