What was found
NR 3 ENG FLAMED OUT WHILE DESCENDING THRU FL 220 EN ROUTE. ENG FAILURE WAS ACCOMPANIED BY ILLUMINATION OF BOTH NR 3 GEN OFF LIGHT AND THE NR 3 ENG LOW OIL PRESS LIGHT. ENG WAS RESTARTED, A/C LANDED W/O INCIDENT. INSPECT FOUND THE NR 3 ENG FUEL FILTER AND NR 3 ENG FUEL PUMP DEBRIS SCREEN CONTAMINATED. FUEL TANKS WERE INSPECTED AND CLEANED. IN ADDITION, FUEL FILTERS AND SCREENS WERE R/R'D. A/C HAD COMPLETED A HEAVY MX CHECK AT VENDOR FACILITY ON 04/08/97. THE MX PROGRAM WAS ADJUSTED TO INCREASE THE FREQ OF FUEL FILTER INSPECTIONS.