TM 55-1520-240-T4-6.7 ENGINE NO. 2 TRIM CIRCUIT BREAKER WILL NOT STAY CLOSED (Continued)4-6.7,DID CIRCUIT BREAKER OPENBEFORE ENGINE TRIM SWITCHNoDID CIRCUIT BREAKER OPENWAS SET TO RPM INCREASEWHEN ENGINE TRIM SWITCH ISOR RPM DECREASE?SET TO RPM INCREASE?CHECK FOR GROUND ON RE-MAINING WIRES ON TB18TERM 6 IS GROUND PRESENT?DISCONNECT COPILOT THRUSTGRIP PLUG. CHECK FORGROUND ON TB18 TERM 6. ISGROUND PRESENT?LOCATE GROUND FAULT WIREW639-316-22 OR W552-163-22 BETWEEN CB 103CB5 ANDTB18. REPAIR OR REPLACEWIRE AS REQUIRED.REPLACE ENGINE NO. 2TRIM CIRCUIT BREAKER103CB5.REPLACE COPILOT THRUSTGRIP.REMOVE PILOT FLOOR PANEL.DISCONNECT PILOT THRUSTGRIP PLUG 300P25. CHECK FORGROUND ON TB18 TERM 6. ISREPLACE PILOT THRUST GRIP.GROUND PRESENT?YESLOCATE GROUND FAULT ONWIRE W696-52-22 OR W696-47-22 BETWEEN RECEPTACLES300J25 AND 300J26 ANDTB18. REPAIR OR REPLACEWIRE AS REQUIRED.OPEN RIGHT ELECTRICAL COM-PARTMENT. DISCONNECT WIREDISCONNECT PLUG 103P2W592-41-22 FROM RELAYFROM NO. 2 ENGINE CONTROL103K2 TERM B2, CHECK FORBOX 103A2. CHECK FORGROUND ON WIRE. IS GROUNDGROUND ON PLUG 103P2 PIN BPRESENT?IS GROUND PRESENT?RECONNECT WIRE W592-41-22TO RELAY 103K2. REMOVE CO-PILOT FLOOR PANEL. DISCON-NECT COPILOT THRUST GRIPPLUG 300P25, SET PILOT NO. 1& NO. 2 ENGINE SWITCH TORPM DECREASE. CHECK FORGROUND ON TB18 TERM 13. ISGROUND PRESENT?CONNECT COPILOT THRUSTGRIP PLUG. REMOVE PILOTFLOOR PANEL. DISCONNECT Pl-LOT THRUST GRIP PLUG300P25. SET COPILOT NO. 1 &NO, 2 ENGINE SWITCH TO RPMDECREASE. CHECK FORGROUND ON TB18 TERM 13. ISGROUND PRESENT?REPAIR OR REPLACE COPILOTTHRUST GRIP.REPAIR OR REPLACE PILOTTHRUST GRIP.OPEN RIGHT ELECTRICAL COM-PARTMENT. DISCONNECT WIREW592-28-22 FROM RELAY103K2 TERM X 1. CHECK FORNOREPLACE RELAY 103K2GROUND ON WIRE. IS GROUNDPRESENT?LOCATE GROUND FAULT ONWIRE W592-28-22, W639-325-22, W696-49-22 OR W696-44-22 BETWEEN RELAY 103K2,TB18 AND RECEPTACLES300J25 AND 300J26. REPAIROR REPLACE WIRE AS RE-QUIRED,REPLACE NO. 2 ENGINE CON-TROL BOX 103A2.LOCATE GROUND FAULT ONWIRE W592-41-22 BETWEENRELAY 103K2 AND PLUG103P2. REPAIR OR REPLACEWIRE AS REQUIRED.GO TO NEXT PAGEChange 54-135
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