What was found
PHL - FLT 637 - CAPTAIN REPORTED THAT THE NR 2 ENGINE FLAMED OUT AT FL120 ON DESCENT INTO PHL. RESTART WAS ATTEMPTED, BUT UNSUCCESSFUL. APU FAILED TO START ALSO. EMERGENCY WAS DECLARED. FLIGHT LANDED WITHOUT FURTHER INCIDENT AT PHL. TOTAL SINGLE ENGINE TIME WAS 15 MINUTES. MAINTENANCE REMOVED AND REPLACED THE NR 2 ENGINE FUEL PUMP PER MM 73-11-1. ALSO, REPLACED THE FUEL CONTROL (P/N 743602-4 ON THE NR 2 ENGINE AS PRECAUTIONARY. PERFORMED ENGINE RUN. OPERATIONAL CHECK AND LEAKD CHECK GOOD. STARTED APU SEVERAL TIMES WITH NO PROBLEM. AIRCRAFT OK FOR SERVICE. (M)