TM 1-1520-238-T-4 6–132 Change 1 6–60. OIL PSI NOSE GRBX 2 INDICATOR – IS LIGHTED WHEN HOD DISPLAYS LOW NGB 2 6–60 OIL PRESSURE Tools: Nomenclature Part Number Tool Kit, Powertrain SC518099CLA013 Repairer’s Personnel Required: 68D Aircraft Powertrain Repairer/NDI 152FG Maintenance Test Pilot References: TM 1-1520-238-23 TM 1-1520-238-CL Equipment Conditions: Ref Condition TM 1-1520-238-CL Engine 2 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. 1. Check HOD display for NGB 2 oil temperature reading. Is oil temperature 121 C or higher? YES Replace NGB 2 lube pump (TM 1-1520-238-23). NO Go to step 2. 2. Check pilot caution/warning panel OIL HOT NOSE GRBX 2 indicator. Is indicator lighted? YES Go to paragraph 6–57 to troubleshoot HOD NGB 2 display. NO Go to step 3. 3. Check HOD display for NGB 1 oil pressure reading. Is reading 35 LB or lower? YES Go to step 4. NO Go to paragraph 6–59 to troubleshoot OIL PSI NOSE GRBX 2 indicator. 4. Check HOD display for NGB 2 oil pressure reading. Is reading 28 LB or lower? YES Replace NGB 2 (TM 1-1520-238-23). NO Go to step 5. 5. Visually inspect NGB 2 for low oil level and damage (TM 1-1520-238-23). Is damage present? YES Replace NGB 2 (TM 1-1520-238-23). NO Replace NGB 2 lube pump (TM 1-1520-238-23). END OF TASK