TM 1-1520-238-T-4 6–146 Change 1 6–70. OIL HOT MAIN XMSN 2 INDICATOR – IS LIGHTED WHEN HOD DISPLAYS NORMAL XMN 2 6–70 OIL TEMPERATURE Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Tool Kit, Powertrain SC518099CLA013 Repairer’s Adapter, Straight Pipe A1100-4-4 to Tube, Female Pipe End, 37 Flared Gage Pressure, Dial GGG76 Indicating (0-200 PSI) Multimeter, Digital AN/PSM-45 Personnel Required: 68D Aircraft Powertrain Repairer/NDI 68X Armament/Electrical Systems Repairer 152FG Maintenance Test Pilot References: TM 1-1520-238-T-6 TM 1-1520-238-23 TM 1-1520-238-CL TM 9-1230-476-20-2 Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provisions – L325, R200, R290R, R295, T250L, T250R, T290L and T325 access doors open WARNING Turn off power before detaching or attaching wires and connectors. High current 28 VDC or 115 VAC is present. Failure to do so could result in death or serious injury. 1. Check HOD display XMN 2 oil pressure reading. Is reading 28 LB or lower? YES Go to step 3. NO Go to step 2. 2. Check for short between J755–17 and J755–19. Does short exist? YES Replace main transmission oil system 2 chip detector (TM 1-1520-238-23). NO Go to step 4. 3. Visually inspect soil system 1 for low oil level and physical damage (TM 1-1520-238-23). Is damage present? YES Replace main transmission (TM 1-1520-238-23). NO Go to step 5. 4. Check for short between P755–17 and P18–66. Does short exist? YES Repair shorted wire. Go to paragraph 6–13. NO Refer to TM 1-1520-238-T-6 to troubleshoot the pilot caution/warning system. 5. Remove engine system 1 heat exchanger pressure transducer (TM 1-1520-238-23). Install pressure gage. Start engine 1 and place PWR lever to FLY (TM 1-1520-238-CL). Operate until readings stabilize. Is oil pressure above 28 LB on pressure gage? YES Go to step 6. NO Replace main transmission (TM 1-1520-238-23).