What was found
EN ROUTE TO MKC, THE LT AND RT FUEL QUANTITY INDICATORS DISPLAYED A RAPIDLY DECREASING FUEL TOTALLY INCONSISTENT WITH THE FUEL FLOW INDICATIONS. AN EMERGENCY WAS DECLARED AND AIRCRAFT DIVERTED AND LANDED AT STL WITHOUT INCIDENT. FUEL CONTENTS GAUGE AMPLIFIERS; LEFT P/N FAB50, SN TW777. TT 6,783.2 HOURS, RT PN FAB30, SN TP2848. TT 6,783.2 HOURS. AMPLIFIER COAXIAL CONNECTORS WERE FOUND WET. CONNECTORS DRIED AND CLEANED. ACFT FUEL QUANTITY CALIBRATION CHECK PERFORMED WITH NO DISCREPANCIES. ACFT RETURNED TO SERVICE. REF: OPER CONTROL NR 98ZZZX498.