What was found
ON FLIGHT 9806 THE CREW REPORTED THE ENGINE NR 2 PULSING ON DESCENT THROUGH 11,000 RETURNED TO NORMAL ON LEVEL OFF OCCURED AGAIN ON APPROACH. THE CREW DECLARED AN EMERGECNY AND LANDED WITHOUT INCIDNET. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED NR 2 ENG FPMU IAW RR AMM 73-21-10. THE OPERATIONAL CHECK AND LEAKS CHECKS WERE GOOD. ALSO REMOVED AND REPLACED-- O-RING, PART NUMBER: AS3209-239. GASKET, PART NUMBER: MS27196-16. PACKING, PART NUMBER: AS3085-111. THE AIRCRAFT WAS RETURNED TO SERVICE.