What was found
CAPT'S DG FAILED IN FLIGHT. REMOVED, CONNECTOR & REINSTALLED NR 1 DG OPS, CHECKED GOOD. SWAPPED NR 1 DG & NR 3 DG PENDING FURTHER TROUBLESHOOTING, OPS CHECKED NR 1, NR 2, & NR 3 SYSTEMS OPS CHECKED GOOD IAW A300AMM 34-25-34 & 34-25-00.