What was found
AT 4000 FT DURING DESCENT, HAD ELECTRICAL POWER LOSS, KICKING OFF AUTOPILOT AND ASA CHANGED TO LAND 2 WITH LOSS OF CAPTAIN`S FD PFD WENT BACK TO NORMAL IN THREE SECONDS WITH A STATUS MESSAGE OF STBY INVERTER. IAW FIM 24-33 F/T 808, REPLACED THE STATIC INVERTER IAW AMM 24-33-03-4. OPS CHECKED NORMAL.