What was found
ENG #1 OVERHEAT CAUTION LIGHT DOES ILLUMINATE DURING OVHT/FIRE TEST WITH SWITCH IN NORMAL POSITION. LOOP A TESTS OK. GROUNDED - YES. ON INITIAL EVALUATION RETURNED ENGINE 1 LOOP SELECTOR TO NORMAL POSITION. OPERATIONAL TEST OF FIRE DETECTION SYSTEM GOOD. ACCOMPLISHED BITE TEST OF FIRE DETECTION MODULE, NO FAULTS DISPLAYED. AS PRECAUTION, ACCOMPLISHED B737-900 FIM 26-10 TASK 805, CLEANED AND TORQUE CHECKED LOOP B TERMINAL LUGS AND ACCOMPLISHED GVI OF DETECTORS. OPS CK OF FIRE DETECTION SYSTEM GOOD. NO DEFECTS NOTED.