What was found
(CAN) ENROUTE #2 ENGINE FUEL FILTER BY-PASS CAUTION LIGHT ILLUMINATED. THE AIRCRAFT CONTINUED TO DESTINATION WITHOUT INCIDENT. POST FLIGHT INVESTIGATION REVEALED SOME MINOR CONTAMINATION OF THE #2 ENGINE HIGH PRESSURE FUEL PUMP FILTER. FILTER ELEMENT REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE. THE SUBMITER STATES THAT THIS OCCURRENCE IS FREQUENT AND IS THE SUBJECT OF ANALYSIS WITH THE OPERATORS RELIABILITY DEPARTMENT AND PRATT & WHITNEY. THERE ARE 13 SIMILAR OCCURRENCES ON THE SDR DATA BASE.