TM 1-1520-238-T-4 6–82.4 Change 5 6–17.3. HOD XMN 2 READING – DISPLAYS 49 LB OIL PRESSURE OR LESS 6–17.3 Tools: Nomenclature Part Number Tool Kit, Aircraft SC518099CLA01 Mechanic’s Tool Kit, Electrical SC518099CLA06 Repairer’s Adapter, Straight Pipe A1100-4-4 to Tube, Female Pipe End, 37 Flared Gage Pressure, Dial GGG76 Indicating (0-200 PSI) Tester, MP-1 6685-00-693-5009 Multimeter, Digital AN/PSM-45 Personnel Required: 67R Attack Helicopter Repairer 68X Armament/Electrical Systems Repairer 152FG Maintenance Test Pilot References: TM 1-1520-238-23 TM 1-1520-238-CL TM 55-1500-323-24 TM 9-1230-476-20-2 Equipment Conditions: Ref Condition TM 1-1520-238-CL Engine operating. 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. NOTE A reading of 50 LB on the HOD is generally a wiring problem. Troubleshoot in accordance with Task 6–17.1 before proceeding. 1. Visually inspect transmission for low oil level and damage (TM 1-1520-238-23). Is damage present? YES Replace transmission (TM 1-1520-238-23). Go to paragraph 6–13. NO Go to step 2. 2. Check pilot caution/warning panel OIL PSI MAIN XMSN 2 indicator. Was indicator lighted during normal operation? YES Go to step 4. NO Go to step 3. 3. Remove oil system 1 heat exchanger pressure transducer (MT10) (TM 1-1520-238-23). Connect MT10 to Testor, MP–1. Observe HOD while applying pressure to transducer with tester. Does HOD reflect applied pressure within +/–5 PSI from 0 to 100PSI? YES Reinstall MT10 (TM 1-1520-238-23). Go to step 4. NO Replace oil system 2 heat exchanger pressure transducer (TM 1-1520-238-23). Go to paragraph 6–13.