As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT WAS TAXIED OUT TO THE RUNWAY FOR INITIAL FLIGHT. WHILE CARRYING OUT HOVER TESTING IS WAS NOTICED THAT AN EXCESSIVE AMOUNT OF FUEL WAS TRANSFERRING AFT FROM NR 1 FUEL SYSTEM TO NR 2 FUEL SYSTEM. THIS WAS DISCOVERED DURING PRODUCTION FLIGHT TEST. IT WAS LATER DISCOVERED THAT THE MEMBRAME HOLDING THE FLAPPER MAY SWELL IF TOO THIN AND PUSHING ON THE METALLIC BODY.