What was found
RIGHT TANK FUEL DECREASD 1000LBS FOR UNKNOWN REASON. REMOVED AND REPLACED NR 1 FQIS TANK UNITS F15L, F1L, F2L, F3L, AND NR 2 FQIS TANK UNITS F15R, F1R, F2R, F3R, F4R, F5R, F6R, F7R, F8R, F9R, F10R, F12R IAW AMM 28-41-21-000/400-801. . FQIS TEST PASS REF AMM 28-41-00-730-801. A/C FQIS BACK NORMAL. OK TO RETURN TO SERVICE.