TM 1-1520-238-T-7 11–436 Change 5 11–133. PILOT ND/NU SWITCH DOES NOT MOVE STAB UP – STAB AUTO AC (CB2) AND STAB 11–133 AUTO DC (CB3) CIRCUIT BREAKERS OPEN 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 1-1520-238-23 Equipment Conditions: Ref Condition 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. Open STAB MAN DC (A76)CB6 and STAB MAN AC (A76)CB7 circuit breakers. Detach: P2 from (A402)J2, P437 from (A402)J25, P427 from (A402)J28. Check for open between: STAB MAN DC (A76)CB6 and P2–g, (A402)J2–g and (A402)TB2–23–A, (A402)TB2–23–D and (A402)J25–A, (A402)P437–A and J993–B, (A402)TB2–23–E and (A402)TB2–24–A. Does open exist? YES Repair open wire. Go to paragraph 11–88. NO Go to step 2. 2. Hold pilot collective ND/NU switch on to NU. Check for open between (A641): J993–B and J993–A. Does open exist? YES Replace pilot MAN STAB switch (TM 1-1520-238-23). NO Go to step 3. 3. Detach P1077. Check for open between (A329): TB1–4–A and J1–v, P1077–v and GS4–A. Does open exist? YES Repair open wire. Go to paragraph 11–88. NO Go to step 4. 4. Check for open between: (A641)J993–A and P437–B, (A402)J25–B and (A402)TB2–21–D, (A402)TB2–21–A and (A402)J28–G, (A402)P427–G and (A323)P485–R, (A323)J7–R and (A323)XK1–3–X1, (A323)XK1–3–X2 and GS–4–A. Does open exist? YES Repair open wire. Go to paragraph 11–88. NO Replace MAN CONT NOSE UP relay (A323)K1–3 (TM 1-1520-238-23). END OF TASK