TM 1-1520-238-T-7 11–119 11–15. FORCE TRIM – DOES NOT ENGAGE 11–15 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Extractor, Relay CTJ-RO6 Personnel Required: 68X Armament/Electrical Systems Repairer One person to assist References: TM 1-1520-238-T-6 TM 1-1520-238-23 Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provisions – L200 access panel – pilot and CPG cyclic stick covers and angle plates – B60 access panel – electrical power distribution box forward cover removed 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 pilot cyclic stick, set FORCE TRIM switch ON. With relay (A402)XK1–9/10 removed, check for 28 VDC at K1–9/10–X1. Is voltage present? YES Go to step 11. NO Go to step 2. 2. Check for 28 VDC at (A402)TB3–9–K. Is voltage present? YES Go to step 5. NO Go to step 3. 3. Check for 28 VDC at P441–B10. Is voltage present? YES Repair open wire between (A402): TB3–9–K and J24–B10. Go to paragraph 11–12. NO Go to step 4. 4. Check for 28 VDC at (A76)J1–Y. Is voltage present? YES Repair open wire between P463–Y and P441–B10. NO Refer to TM 1-1520-238-T-6 to troubleshoot TRIM circuit breaker (CB87), circuit protection (dc emergency bus – pilot station). 5. Check for 28 VDC at (A402): K1–9/10–A2, K1–9/10–B2, K1–9/10–C2. Are all voltages present? YES Go to step 6. NO Repair open wire between (A402): K1–9/10–A2 and TB3–9–J, K1–9/10–B2 and TB3–9–H, K1–9/10–C2 and TB3–9–G. Go to paragraph 11–12. 6. Check for open between (A402): K1–9/10–A2 and K1–9/10–A3, K1–9/10–B2 and K1–9/10–B3, K1–9/10–C2 and K1–9/10–C3, K1–9/10–X1 and K1–9/10–X2. Does open exist? YES Replace relay XK1–9/10 (TM 1-1520-238-23). NO Go to step 7.