What was found
NR 1 ENG FAILED DURING FLIGHT. 1ST INDICATION WAS EXCESSIVE NR 1 FUEL FLOW AND 2 KNOB DIFF BETWEEN NR 1 THRUST LEVER AND NR 2/3. JUST PRIOR TO FAILURE, NR 1 EPR 1.6 (2/3 EPRS 1.8). NR 1 N1 80 NR 2/3 N1S 85) N2 86 (NR 2/3 N2S 88/90) NR 1 FF 4000 (2/3 3400). APPROX 30 MI NORTH OF MEM NR 1 CSD FELL OFFLINE AND ENG FAILED. ENG WAS SHUTDOWN IN ACCORDANCE W/QRH. REMOVED AND REPLACED ORIGINAL P&D VALVE WITH NEW O-RINGS AND REPLACED MISSING FARRULE PER PWA ENG MANUAL 73-12-01-450-002 IDLE LEAK CKS OK. ACCOMPLISHED HIGH POWER RUN PER JRH, ALL ENGINE PARAMETERS NORMAL , NO LEAKS NOTED , A/C OK FOR SERVICE.