What was found
ON 12-31-2016 AT APPROXIMATELY 10:00 CST, PIC OBSERVED A LOW PRESSURE FUEL LIGHT AND A NOTICEABLY INCREASING FUEL IMBALANCE. DECLARED AN EMERGENCY AND LANDED, DOUR TROUBLESHOOTING, FOUND DEBRIS IN THE CONNECTOR PLUG TO THE LOW PRESSURE SWITCH. THE DEBRIS WAS CLEANED AND CONNECTOR INSTALLED. THE FUEL TRANSFER, CROSSFEED VALVE AND FOUND IT WET WITH WATER. CLEANED AND COVERED VALVE IN GREASE IAW AMM 28-20-00. PERFORMED MULTIPLE ENGINE RUNS IAW MM 71-00-00 AT DIFFERENT POWER SETTINGS AND PERFORMED MULTIPLE FUEL TRANSFERS WITH NO DEFECTS NOTED. AN OPERATIONAL FLIGHT CHECK WAS SATISFACTORILY PERFORMED WITH NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.