What was found
(CAN) DURING GROUND HANDLING FUEL LEAK ON LT ENGINE WAS OBSERVED. FURTHER INVESTIGATION REVEALED THAT FUEL LINE BETWEEN FCU AND FUEL LIMITER WAS CHAFED THROUGH. TEMPORARY REPAIR TO FLY AIRCRAFT BACK TO HOME BASE. AT HOME BASE FUEL LINE REPLACED BY NEW AND AIRCRAFT RETURNED TO SERVICE.ASSUMED REASON FOR DAMAGE: DISLOCATION DUE TO BROKEN BRACKET ON FUEL LIMITER (REPLACED AS WELL), RESULTING IN CHAFING CONTACT WITH AIR BOX.