What was found
FLT 6503 - LGA-IAD - DURING LANDING, EXPERIENCED A LT ENGINE TQ FLUCTUATION. A/C DECLARED AN EMERGENCY AND MADE AN UNEVENTFUL LANDING AT IAD. MX CONTROL DISPATCHED. MX TO THE AIRCRAFT WHERE THE MX PERSONNEL FOUND A DISCREPANCY WITH THE LT ENGINE NR 1 TORQUE BRIDGE. MX PROGRAMMED THE IEC TO SELECT THE NR 2 TORQUE BRIDGE IAW SB TPE 331-76-7013 AND MM REF CHAP 71. ENGINE GROUND RUNS WERE COMPLETED SATISFACTORILY. DURING THE RUNS IT WAS NOTED THAT THE DELTA P/P BPX WAS CAUSING AN ERROR MESSAGE TO THE IEC. MX REMOVED AND REPLACED THE DELTA P/P TRANSDUCER IAW CHP 76 OF THE MM. ALL GROUND ENGINE RUNS WERE COMPLETED AND WERE SATISFACTORY. A/C WAS THEN RELEASED FOR SERVICE. (M)