As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL SMELL ON CLIMB OUT ONLY WITH TANKS TOPPED. FOUND RUBBER COUPLINGS SPLIT ON VENT LINE ON LEFT TANK. THIS AREA IS NOT INSPECTABLE UNLESS THE FUEL TANK IS REMOVED FROM THE WING. THE TANK IS A REMOVABLE 'WET WING' DESIGN. THERE ARE 2 COUPLINGS PER TANK. THIS IS A 1968 AND THESE ARE BELIEVED TO BE ORIGINAL.