What was found
MIA - FL 1850 - FLT HAD JUST DEPARTED MIA WHEN THE CAPT NOTICED A LOSS OF PWR FROM THE NR 2 ENG N1 DROPPED TO APPROX 30 PERCENT ON THE NR 2 ENG. CAPT ELECTED TO RETURN TO FIELD AT MIA. NO EMERGENCY WAS DECLARED AND THE FLT LANDED WITHOUT FURTHER INCIDENT. THE NR 2 ENG WAS NOT SHUT DOWN BUT RAN AT IDLE UNTIL LANDING. MX REPLACED THE FOLLOWING ITEMS ON THE NR 2 ENGINE FOR T/S PURPOSES, CIT SENSOR, T2 SENSOR, FUEL PUMP AND MEC. SUBSEQUENTLY, MX FOUND THE COMPRESSOR DISCHARGE PRESSURE LINE AT THE COMPRESSOR CASE COMPLETELY BACKED OFF. TIGHTENED AND SECURED 'B' NUT. LEAK CHECK GOOD AND POWER RUN GOOD. ALL PARAMETERS NORMAL. (M)