What was found
(CAN) WHILE TAXIING, PILOT NOTICED FLAMES COMING FROM LEFT ENGINE. THE ENGINE WAS SHUT DONW AND FLAMES WENT OUT. ENGINE COWLING AREA WAS FOAMED AS A PRECAUTIONARY MEASURE WHEN THE COWLS WERE REMOVED A FLEX FUEL LINE FROM THE FUEL DISTRIBUTOR ON THE TOP OF THE ENGINE DOWN BETWEEN #1 ABD #3 CYLINDERS TO THE FUEL SERVO WAS RUPTURED. ALSO THE #3 IGNITION LEAD WAS OFF AND LAYING BY THE SPARK PLUG. A CHECK OF THE OTHER FLEX HOSES IN BOTH ENGINE COMPARTMENTS REVEALED DATE CODES RANGING FROM 1976 TO 1990 AND THE RUPTURED HOSE DID NOT HAVE ANY IDENTIFICATION TAG.