What was found
AIRCRAFT WAS GROUNDED: AT 500 FEET ON APPROACH THERE WAS A VERY STRONG ELECTRICAL SMELLIN AFT GALLEY AND IN COCKPIT. MORE PRONOUNCED IN AFT GALLEY. MAINTENANCE C/W J/C 26L00021001, RAN BOTH ENGINES AND FOUND LIGHT AT ROW 27DEF FLICKERING WITH AN ACRID ODOR IN SURROUNDING AREA. REMOVED AND REPLACED BALLAST AT ROW 27DEF IAW AMM 33-21-11. RE-RAN ENGINES, NO SMELLS NOTED,