What was found
NUMBER 2 ENGINE FIRE-OVERHEAT TEST FAILED IN LOOP B TEST OK IN LOOP A. ACFT GROUNDED. UNABLE TO DUPLICATE DEFECT. WITH NR 2 ENGINE LOOP SELECT SWITCH SET TO BOTH, ENGINE FIRE DETECTION, OPS TESTED IAW AMM 26-11-00-710-801 PASSED WITH NO FAULTS. OPENED THE NR 2 ENGINE COWLING AND PERFORMED ENGINE FIRE DETECTION INSPECTION IAW AMM 26-11-01-211-801. NO DEFECTS NOTED. ALL TERMINALS SECURE AND NO LOOP OR HARNESS DAMAGE NOTED. CLOSED NR 2 ENGINE COWLING AND PERFORMED ENGINE FIRE DETECTION, OPS TESTED IAW AMM 26-11-00-710-801, ALL TESTS PASS.