As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RT WING TANK FUEL DRAIN WAS FOUND TO BE LEAKING. UPON REMOVAL OF THE DRAIN P/N L83A13-628, THE INSTALLATION O-RING P/N M25988/1-021 WAS FOUND TO BE MISSING. THE LT WING TANK FUEL DRAIN WAS REMOVED FOR INSPECTION AS A PRECAUTION AND IT HAD THE O-RING INSTALLED.