As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)WHILE COMPLYING WITH CAP 28-30-01 THE FUEL DRAINS ON THE RIGHT HAND WING AND BOTH RESERVE TANKS WERE FOUND TO BE BADLY CORRODED AND THE INTERNAL SPRINGS WERE STICKING. THE FUEL DRAINS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.