TM 55-1520-240-T 1-1  FAILURE SYMPTOM LIST (Continued) 1-1 SYMPTOM TASK CHAPTER 4 (Continued) DECU CODE A4 4-12.4 DECU CODE A5 4-12.4 DECU CODE A6 4-12.4 DECU CODE A7 4-12.4 DECU NO. 1 CODE C1, C2, C3, C4, C5, C6, C7, C8 OR CF 4-12.4 DECU NO. 2 CODE C1, C2, C3, C4, C5, C6, C7, C8 OR CF 4-12.4 DECU NO. 1 CODE C9 4-12.4 DECU NO. 2 CODE C9 4-12.4 DECU CODE B4 OR E1 4-12.4 DECU CODE E2 4-12.4 DECU CODE E3 4-12.4 DECU CODE B3 OR E4 4-12.4 DECU CODE F1 4-12.4 DECU CODE B2 OR F2 4-12.4 DECU CODE F4 4-12.4 DECU CODE F5 4-12.4 DECU CODE B7 OR F6 4-12.4 DECU CODE F7 4-12.4 DECU CODE F8 4-12.4 DECU CODE F9 4-12.4 DECU CODE FA 4-12.4 DECU CODE FB 4-12.4 DECU CODE D1 4-12.4 DECU CODE D2 4-12.4 DECU CODE DE 4-12.4 ENGINE ACCESSORY GEARBOX CHIP DETECTORS (WITH 74 ) ENG 1 OR ENG 2 CHIP DETR CAPSULE IS LIT 4-13.3 NO. 1 OR NO. 2 ENGINE CHIP DETECTOR INDICATOR DIS- PLAYS BLACK AND WHITE FAN, ENG 1 OR ENG 2 CHIP DETR CAPSULE IS OUT 4-13.3 ENG 1 CHIP DETR CAPSULE DOES NOT COME ON WHEN GND SWITCH IS SET TO TEST 4-13.3 SYMPTOM TASK ENG 2 CHIP DETR CAPSULE DOES NOT COME ON WHEN GND SWITCH IS SET TO TEST 4-13.3 NO. 1 OR NO. 2 ENGINE CHIP DETECTOR INDICATOR IS ALL BLACK WHEN GND SWITCH IS SET TO TEST 4-13.3 ENG CHIP DETR CAPSULE DOES NOT COME ON AND EN- GINE CHIP DETECTOR INDICATOR DOES NOT CHANGE DIS- PLAY WHEN DETECTOR IS SHORTED 4-13.3 CHAPTER 5 ROTOR BLADE TRACKING AND BALANCING SYSTEM GREEN POWER STATUS LIGHTS DO NOT COME ON WHEN HELITUNE UNIT IS TURNED ON 5-2.3 NO FWD LATERAL OR AFT LATERAL INDICATION ON IPS IN- DICATOR 5-2.3 NO FWD VERTICAL OR AFT VERTICAL INDICATION ON IPS INDICATOR 5-2.3 PHAZOR CLOCK ANGLE INDICATOR LIGHTS DO NOT COME ON 5-2.3 ROTOR BLADE CIRCUIT BREAKER WILL NOT STAY CLOSED 5-2.3 TRACKING TARGETS NOT VISIBLE OR STROBEX TUBE LAMP DOES NOT FLASH 5-2.3 CHAPTER 6 TRANSMISSION LUBRICATION SYSTEMS XMSN AUX OIL PRESS CAPSULE ON WITH ROTORS TURN- ING 6-1.3 XMSN OIL HOT CAPSULE ON, ONE TRANSMISSION OIL TEMPERATURE INDICATION HIGH 6-1.3 XMSN OIL PRESS CAPSULE ON AND ONE TRANSMISSION OIL PRESSURE INDICATION LOW 6-1.3 XMSN OIL PRESS CAPSULE ON, TRANSMISSION OIL PRES- SURE INDICATIONS NORMAL 6-1.3 TRANSMISSION CHIP DETECTORS AND INDICATING SCREENS AFT TRANSMISSION DEBRIS SCREEN INDICATOR DOES NOT CHANGE TO BLACK-AND-WHITE FAN DISPLAY WHEN DEBRIS SCREEN SHORTED 6-2.3 FWD TRANSMISSION DEBRIS SCREEN INDICATOR DOES NOT CHANGE TO BLACK-AND-WHITE FAN DISPLAY WHEN DEBRIS SCREEN SHORTED 6-2.3 LEFT TRANSMISSION DEBRIS SCREEN INDICATOR DOES NOT CHANGE TO BLACK-AND-WHITE FAN DISPLAY WHEN DEBRIS SCREEN SHORTED 6-2.3 SYMPTOM TASK LH COMB TRANSMISSION DEBRIS SCREEN INDICATOR DOES NOT CHANGE TO BLACK-AND-WHITE FAN DISPLAY WHEN DEBRIS SCREEN SHORTED 6-2.3 NO. 1 ENG CHIP DET CAPSULE DOES NOT COME ON WHEN NO. 1 ENGINE TRANSMISSION CHIP DETECTOR SHORTED 6-2.3 NO. 1 OR NO. 2 ENG CHIP DET (WITHOUT 74 ) ENG 1 OR ENG 2 CHIP DETR (WITH 74 ) CAPSULE LIT TRANSMISSION OR ENGINE CHIP DETECTOR INDICATOR BLACK-AND- WHITE 6-2.3 NO. 2 CHIP DET (WITHOUT 74 ) ENG 2 CHIP DETR (WITH 74 ) CAPSULE DOES NOT COME ON WHEN NO. 2 ENGINE TRANSMISSION CHIP DETECTOR SHORTED 6-2.3 RH COMB TRANSMISSION DEBRIS SCREEN INDICATOR DOES NOT CHANGE TO BLACK-AND-WHITE FAN DISPLAY WHEN DEBRIS SCREEN SHORTED 6-2.3 RIGHT TRANSMISSION DEBRIS SCREEN INDICATOR DOES NOT CHANGE TO BLACK-AND-WHITE FAN DISPLAY WHEN DEBRIS SCREEN SHORTED 6-2.3 TRANSMISSION CHIP DETECTOR INDICATOR DISPLAY, BLACK-AND-WHITE FAN, XMSN CHIP DET (WITHOUT 74 ) XMSN CHIP DETR 74 ) CAPSULE OUT 6-2.3 TRANSMISSION CHIP DETECTOR INDICATOR IS ALL BLACK WHEN GND SWITCH IS SET TO TEST 6-2.3 TRANSMISSION DEBRIS SCREEN INDICATOR DISPLAYS BLACK-AND-WHITE FAN 6-2.3 TRANSMISSION DEBRIS SCREEN INDICATOR IS ALL BLACK WHEN GND SWITCH IS SET TO TEST 6-2.3 XMSN CHIP DET (WITHOUT 74 ) XMSN CHIP DETR (WITH 74 ) CAPSULE DOES NOT COME ON WHEN AFT SHAFT CHIP DETECTOR SHORTED 6-2.3 XMSN CHIP DET (WITHOUT 74 ) XMSN CHIP DETR (WITH 74 ) CAPSULE DOES NOT COME ON WHEN AFT TRANSMIS- SMON CHIP DETECTOR SHORTED 6-2.3 XMSN CHIP DET (WITHOUT 74 ) XMSN CHIP DETR (WITH 74 ) CAPSULE DOES NOT COME ON WHEN COMBINING TRANSMISSION CHIP DETECTOR SHORTED 6-2.3 XMSN CHIP DET (WITHOUT 74 ) XMSN CHIP DETR (WITH 74 ) CAPSULE DOES NOT COME ON WHEN FORWARD TRANSMISSION CHIP DETECTOR SHORTED 6-2.3 XMSN CHIP DET (WITHOUT 74 ) XMSN CHIP DETR (WITH 74 ) CAPSULE DOES NOT CU-7E ON WHEN GND SWITCH SET TO TEST 6-2.3 GO TO NEXT PAGE Change 17  1-5