What was found
ENG #2 LOOP A OVHT / FIRE PROTECTION INOP. GROUNDED - YES. ENGINE AND APU FIRE/OVHT DETECTION CONTROL MODULE BITE SHOWS ENG 2 LOOP A - WIRING OPEN/DETECTOR FAULT. REF B737-900 FIM 26-10 TASK 805, VERIFIED LOOP A RESISTANCE READINGS FOR DETECTOR M1757, M1758, M1759, AND M1760 ARE WITHIN TOLERANCE. FOUND UPR FAN LOOP A TERM A/1 IS CONTAMINATED, CLEANED AND SECURED TERMINAL. PERFORMED ENGINE/APU FIRE DETECTION CONTROL MODULE BITE GOOD W/O FAULTS.