What was found
THIS FRONT TANK FUEL VENT TUBE FOUND TO HAVE DISCONNECTED FROM THE RUBBER BLADDER. THE HOSE CLAMP WAS TIGHT BUT THE TUBE WAS ABLE TO WORK ITSELF FROM THE BLADDER CAUSING FUEL LEAKAGE AND GASES TO ESCAPE FROM THE BLADDER. IN INVESTIGATING THIS OCCURRENCE IT WAS NOTICED THAT THIS VENT LINE WHICH HAD A DEHAVILLAND P/N DID NOT HAVE A BULK ON THE END, EVEN THOUGH THE DEHAVILLAND DRAWING P/N C2P1551A CLEARLY SHOWS THIS BULBED END. THIS PART WAS REPLACED WITH A NEW DEHAVILLAND UNIT.