What was found
PILOT REPORT OF FUEL LEAK FROM SELECTOR. FOUND LEAKAGE PAST SHAFT SEAL. REMOVED SELECTOR VALVE FOR REPAIR. CCA-1550 DRAIN VALVE WAS INSTALLED IN BOTTOM OF SELECTOR VALVE. WHEN DRAIN VALVE WAS REMOVED, ORING RETAINING WASHER AT END OF DRAIN VALVE WAS OBSERVED TO BE CRACKED IN NUMEROUS PLACES AND IN IMMINENT DANGER OF FAILURE. HAD THE WASHER BROKEN OFF, AN UNCONTROLLABLE LOSS OF FUEL THROUGH THE DRAIN VALVE WOULD HAVE OCCURRED. THE ONLY WAY TO PREVENT FUEL LEAKAGE WOULD HAVE BEEN TO SHUT OFF THE FUEL SELECTOR, WHICH RESULTS IN ENGINE STOPPAGE.