What was found
FUEL CONFIG LIGHT ON AND RT MAIN TANK QTY INCREASED TO 42.6 WHEN LEFT READS 40.4. TTL READS 127.3 AND FMC CALC READS 124.1. FUEL AT DEPT READ 126.6. [5-1-07] REPLACED RT FUEL TANK COMPENSATOR & EMITTER. ALSO, SUSPECT RT MAIN INTANK HARNESS. REPLACED RT MAIN INTANK HARNESS & SUMMING PLUG. SEALED & RETURNED TO SERVICE. FUEL TANK IMBALANCE STILL PARTIALLY INDICATED UNTIL 26MAR07. A/C INPUT TO GSO FOR C13 VISIT 27MAR07. PERFORMED FUEL TANK FLAME ARRESTOR MOD. NO RECURRENCE OF FUEL IMBALANCE AFTER C13 VISIT. SUSPECT TANK WORK/ MOD ACTIVITY RELIEVED A PARTIALLY STUCK FUEL CHECK VALVE.