TM 1-1520-238-T-4 4–112 Change 5 4–31. CPG ENGINE NO 1 PWR LEVER – CANNOT BE ADVANCED TO LOCKOUT 4–31 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Personnel Required: 68X Armament/Electrical Systems Repairer One person to assist References: TM 1-1520-238-T-6 TM 1-1520-238-23 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. On CPG power quadrant, pull up on ENG NO 1 stop release lever. Does THROT circuit breaker stay closed? YES Go to step 3. NO Go to step 2. 2. Detach P173. Check for short between P173–M and ground. Does short exist? YES Go to step 4. NO Replace pilot power quadrant (TM 1-1520-238-23). 3. Detach P463. Check for 28 VDC at (A76)J1–d. Is voltage present? YES Go to step 5. NO Refer to TM 1-1520-238-T-6 to troubleshoot circuit protection system (dc emergency bus – pilot station). 4. Detach P190. Check for short between P190–4 and ground. Does short exist? YES Repair shorted wire between P190–4 and P173–M. Go to paragraph 4–12. NO Replace CPG power quadrant LH stop release switch (TM 1-1520-238-23). 5. Attach P463. Detach P173. On CPG PWR NO 1 throttle, pull and hold stop release lever. Check for 28 VDC at P173–M. Is voltage present? YES Go to step 6. NO Go to step 7. 6. Check for open between P173–N and ground. Does open exist? YES Repair open wire between P173–N and GS391–J. Go to paragraph 4–12. NO Replace pilot power quadrant (TM 1-1520-238-23). 7. Detach P190. Check for 28 VDC at P190–12. Is voltage present? YES Go to step 8. NO Repair open wire between P463–d and P190–12. Go to paragraph 4–12. 8. On CPG power quadrant, pull up on ENG NO 1 stop release lever. Check for open between P173–M and P190–4. Does open exist? YES Repair open between P173–M and P190–4. Go to paragraph 4–12. NO Replace CPG power quadrant (TM 1-1520-238-23). END OF TASK