ENGINE ANTI–ICE LRU FAULT ID (ACY) EICE FAULT ID (ACZ)

TM 1–1520–238–T–3 4–4 Change 4 4–7 SIGNAL NAME: ENGINE ANTI–ICE LRU FAULT ID (ACY) EICE FAULT ID (ACZ) MEMORY LOCATION: 002131 MEMORY DATA BIT(S): 17 (BINARY) CONDITION: If first digit displayed on HOD is 0, 1, 4 or 5=ICE DETECTOR SIGNAL PROCESSOR If first digit displayed on HOD is 2, 3, 6 or 7=SENSOR SIGNAL FUNCTION: Identifies LRU failure. REMARKS: From ice detector sensor through ice detector signal processor through digital automatic stabilization equipment computer (DASEC) MRTU to FCC. Generates FD/LS message ICE DETECTOR SENSOR NO–GO ENG INLET LH SIDE (ACY), ICE DETECTOR SENSOR NO–GO DOGHOUSE FAIRING (ACZ), or ICE DETECTOR CONTROLLER NO–GO FIREWALL LH SIDE. PASS: If first digit on HOD is 1, 2, or 3, go to paragraph 4–8. FAIL: Location of fault: ice detector sensor, wiring from ice detector sensor to ice detector signal processor, ice detector signal processor, wiring from ice detector signal processor to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–8). 4–8 SIGNAL NAME: ENGINE ANTI–ICE STATUS (ACY) EICE STAT (ACZ) MEMORY LOCATION: 002131 MEMORY DATA BIT(S): 18 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates engine anti–ice system status. REMARKS: From ice detector signal processor through DASEC to FCC. PASS: Location of fault if first digit on HOD is 1, 4, or 5: ECS R NOSE GRBX HTR, ECS L NOSE GRBX HTR, and ECS ENGINE ANTI–ICE circuit breakers, wiring from ECS R NOSE GRBX HTR, ECS L NOSE GRBX HTR, and ECS ENGINE ANTI–ICE circuit breakers to ice detector signal processor, ice detector signal processor, wiring from ice detector signal processor to pilot caution/warning panel, pilot caution warning panel. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–8). FAIL: Location of fault: ice detector signal processor, wiring from ice detector signal processor to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–8). 4–9 SIGNAL NAME: RICE CONT STATUS (ACY) RICE CMPTR STAT (ACZ) MEMORY LOCATION: 002131 MEMORY DATA BIT(S): 19 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates rotor anti–ice controller status. REMARKS: From rotor blade de–ice controller through DASEC to FCC. Generates FD/LS message RTR BLADE PWR CONTROLLER NO–GO RH XMSN BAY (ACY) or RTR BLADE PWR CONT NO–GO RH XMSN BAY (ACZ). PASS: If first digit on HOD is 1, 3, 5, or 7, go to failure symptom index and next failure symptom paragraph. FAIL: Location of fault: rotor blade de–ice controller, main rotor and tail rotor slip ring assemblies, main rotor and tail rotor blades, wiring from rotor blade de–ice controller to main rotor and tail rotor slip ring assemblies, wiring from main rotor and tail rotor slip ring assemblies to main rotor and tail blades, wiring from rotor blade de–ice controller to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–8).