What was found
ABORTED TAKE OFF DUE TO LT ENGINE FIRE DET FAULT AT 80 KNTS. FOUND LEFT ENGINE LOWER THRUST REVERSER C-DUCT DELAMINATED IN COLD STREAM. PERFORMED TAKE OFF POWER RUNS ON LT ENGINE. LT ENG FIRE DET FAULT OCCURRED AT 1.39 EPR. REPLACED LT ENG LWR C-DUCT. RAN ENGINE TO POWER WITH NO FAULTS. PERFORMED ALL NO GO ODI TASKS. NO FAULTS FOUND. THE DELAMINATION OF THE LWR C-DUCT IS SUSPECTED TO HAVE IMPACTED NORMAL OPERATION OF THE FIRE LOOP OPERATION.