As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING THE CRUISE PORTION OF AN FLOAT INSTRUCTION FLIGHT, THE INSTRUCTOR NOTICED AN ODOR OF FUEL AND A REDUCTION IN ENGINE POWER. THE CREW DECIDED TO MAKE A PRECAUTINARY LANDING AT A NEAR-BY FLOAT BASE. THE LANDING WAS EXECUTED WITHOUT FURTHER ISSUE. MAINTENANCE DISCOVERED A BROKEN FUEL SUPPLY LINE TO THE ENGINE`S RT MIDDLE CYLINDER. LINE REPLACED AND ACFT RETURNED TO SERVICE.