What was found
(CAN) DUE TO A MAINTENANCE ISSUE WITH A FUEL FILTER, THE ACFT WAS BROUGHT BACK TO AIRPORT. NO FUEL DUMP WAS CARRIED OUT. THE FLIGHT LANDED OVERWEIGHT AND THE CAPTAIN DECLARED A PAN PAN TO HAVE THE EMERGENCY VEHICLES STANDING BY IN CASE OF HOT BRAKES. RESOLUTION NR 1 ENGINE FUEL FILTER REPLACED IAW AMM 73-11-02, PB401. LT ENGINE PRESS FUEL FILTER DIF SWITCH ALSO REPLACED IAW AMM 73-34-01. FUEL TANK SUMPED, NO CONTAMINATION FOUND. ALL NORMAL ON GROUND RUN.