What was found
AFTER FUELING, LEFT TANK INDICATED 8.6 AND RIGHT INDICATED 8.6, CENTER INDICATED 7200. AFTER TAKEOFF AND LEVEL OFF AT CRUISE, LEFT TANK INDICATED 8.14 AND THE RIGHT TANK INDICATED 8.69. THE IMBALANCE FLUCTUATED +/- 800 LBS TO 400 LBS. TOTAL FUEL BURNS MATCHED FLIGHT PLAN. CROSSFEED VALVE OPERATED NORMALLY. GROUNDED - YES. PERFORMED TANK AND COMPENSATOR UNITS TEST REF AMM 28-41-21-710-801. FOUND PROBES F4L, F5L, F6L, F8L AND F9L OUT OF CAPACITANCE LIMITS. REF AMM 28-41-21, REMOVED AND REPLACED NR 1 MAIN F4L, F5L, F6L, F8L AND F9L TANK UNITS. CAPACITANCE VALUES WITHIN LIMITS. PERFORMED GROUND VERIFICATION TEST REF AMM 28-41-00. CHECKS GOOD.