What was found
INFLIGHT FUEL IMBALANCE. TANK NR 1 (LEFT MAIN) 8.40, TANK NR 2 (RIGHT MAIN) 7.30. GROUNDED - YES. PERFORMED FIM 28-41 TASK 820 FOR UNEXPECTED FUEL CONFIGURATION MESSAGES. PERFORMED CROSSFEED VALVE FUNCTIONAL TEST IAW AMM 28-22-00. TEST FAILED. WILL REQUIRE ADJUSTMENT OF CROSSFEED VALVE. ACCOMPLISHED CROSSFEED VALVE ALIGNMENT IAW AMM 28-22-21-820-801. FUNCTIONAL CHECK OF CROSSFEED VALVE FAILED. WILL REQUIRE REMOVAL AND REPLACMENT OF ENGINE FUEL CROSSFEED VALVE. REMOVAL & REPLACEMENT OF ENG FUEL FEED CROSSFEED VALVE ACCOMPLISHED ON MIG 2C # 40-0036681.