As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT TOP OF CLIMB, THE RT INNER TANK WAS APPROXIMATELY 1500-1800 LBS LESS THAN LEFT. PLACED FUEL CROSS FEED IN-LINE, TURNED OFF RT IT PUMPS. RT IT QTY CONTINUED TO DECREASE SLIGHTLY FASTER THAN LEFT. FUEL QTY AT TOP OF CLIMB LF IT=18. REPLACED GFI 42QA IAW ASM 28-21-00. ESR 28-21-46. PERFORMED CGCS ADJUSTMENT AND TEST IAW MM 31-46-00-501. CHECKED GOOD.