What was found
WHILE PERFORMING A MAINTENANCE SERVICE CHECK, MECHANIC NOTICED SMALL FUEL LEAK ON BOTTOM SKIN OF LEFT WING JUST FORWARD OF AND OUTBOARD OF ACCESS PANEL 522EB. INTERNAL INVESTIGATION REVEALED A CRACK IN STRINGER 10A AT THE RIVET HOLE THAT WAS LEAKING FUEL, SEVEN INCHES OUTBOARD OF RIB NR 8. THE STRINGER WAS REPAIRED PER EMB120 SRM 57-20-03, FIGURE 201, PAGES 201-204 AND EMBRAER REPAIR NR SST-1849/99. AIRCRAFT RETURNED TO SERVICE.