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