What was found
(CAN) WHILE UNDERGOING T-CONVERSION, A TECH WORKING IN THE NR 2 FUEL CELL CAVITY AREA FOUND THE FOLLOWING DAMAGE: CRACK ON THE LT, AFT, LOWER SPAR CAP AT WS 49.5. ONCE THE AREA WAS TAKEN APART, THE SPAR CAP WAS FOUND BROKEN. CRACK, 3" IN LENGTH, ON THE LOWER WING SKIN AT WING STA 50 +/-. THE FAIL SAFE STRAP THAT IS ATTACHED TO THE VERTICAL LEG OF THE SPAR CAP WAS FOUND BROKEN. SPAR WEB IS CRACKED AT WS 50 +/-. NON-DESTRUCTIVE INSPECTION TECHS WERE CALLED AND USING EDDY CURRENT EQUIPMENT WITH A ROTARY HOLE PROBE THEY FOUND THE FOLLOWING ADDITIONAL CRACKS. OTBD WING-TO-FUSELAGE ATTACH ANGLE. CRACK IN THE OTBD WING TO FUSELAGE ATTACH ANGLE AT FS 434, WS 50, LOWER FASTENER HOLE. CLOSING WEB CRACKED. SB 215-A454, REV 4, AD CF-1992-26R2 WERE COMPLIED WITH. SINCE THE INSPECTION, THE ACFT HAS SINCE ACCUMULATED 97.1 HOURS, 51 LANDING CYCLES AND 580 WATER DROPS. MFG HAS BEEN NOTIFIED OF THE FINDINGS AND THEIR ENGINEERING STAFF ARE DESIGNING A REPAIR.