What was found
RECEIVED A LT ENGINE FIRE DETECTOR FAULT, THREE TIMES INTERMITTENTLY ON FINAL. OPENED ENGINE FAN COWLS AND THRUST REVERSER COWLS FOR MTC. REPLACED THE LEFT ENGINE CONTROL UNIT AMPLIFIER IAW AMM 26-11. REPLACED ONE CORE ENGINE AND OUTBOARD BIFURCATION ELEMENTS IAW AMM 26-11. REPLACED THE C DUCT HARNESS P1-8087 TO P1-8088 IAW AMM 26-11. REPLACEDD THE INBD B BIFURCATION AND OTBD A BIFURCATION ELEMENTS IAW AMM 26-11. COMPLETED WORK CARD 2611-2001. LEFT ENGINE FIRE DETECTION INTEGRITY CHECKED. OPS TESTED GOOD IAW AMM 26-11.