As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BTB - ETOPS SIGNIFICANT SYSTEM - MAIN TANK FUEL TRANSFERRED FUEL INTO CENTER TANK. 1220# IN 1 HOUR. FUEL SEEM TO COME FROM BOTH TANKS BUT SLIGHTLY MORE FROM LEFT TANK. FOUND FUEL TRANSFER IN UPPER RIB WHICH SEPARATES LEFT AND CENTER TANK. REPAIRED LEAK PER AMM 28-11-00 LK CK OK. CK RT CTR TANK FOUND NO TRANSFER OF FUEL RIGHT TANK INTO CENTER TANK.