What was found
FUEL FILTER BYPASS R CAS ILLUMINATED AT FL450, 4 TIMES AND REMAINED 10MIN DURING DIVERSION BEFORE EXTINGUISHING. FUELED PLANE, 1376 GAL UNTIL TRUCK WAS EMPTY. ADDITIONAL FUEL OF 122GAL ADDED. COULD NOT DUPLICATE DURING ENG RUN. BOTH FUEL FILTER MECHANICAL BYPASS INDICATORS NORMAL, NOT TRIPPED. REMOVED FUEL FOR VISUAL INSP, LOOKED GOOD, NO DEBRIS. INSTALLED NEW FUEL FILTER IN REF TO M/M 73-37-10. OPS/LEAK CHECKS PROVED SATISFACTORY.