As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 41 - GEG TO GEG - FUEL COMING FROM LT WING DURING CLIMBING - REPO'D 568 FROM ONT WITH MX PERSONAL AND PERTS. MX INSPECTED FUEL TANK AND FOUND MOST OUTBOARD FLAPPER VALVE MISSING. MX INSTALLED NEW LT WING FLAPPER VALVE AND PERFORMED OPERATIONAL CHECKS SUCCESFULLY. THE A/C WAS APPROVED TO RETURN FOR SERVICE.