P1M2 MSL AUTO PILOT POWER CONTROL (ACY)

P1M2 MSL SKR INPUT SLAVE (ACY) P1M2 MSL SKR SLV SEL (ACZ)

TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
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TM 1–1520–238–T–3 8–46 Change 4 8–151 SIGNAL NAME: P1M2 MSL AUTO PILOT POWER CONTROL (ACY) P1M2 AUTOPLT PWR (ACZ) MEMORY LOCATION: 001273 MEMORY DATA BIT(S): 9 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Controls application of auto pilot power to missile. REMARKS: From RHE to ECSP. PASS: If fourth digit on HOD is 2, 3, 6, or 7, go to paragraph 8–152. FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–152 SIGNAL NAME: P1M2 MSL AUTO PILOT POWER CONTROL (ACY) P1M2 AUTOPLT PWR (ACZ) MEMORY LOCATION: 001707 MEMORY DATA BIT(S): 9 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Controls application of auto pilot power to missile. REMARKS: From launcher through left outboard MRTU Type II to FCC. PASS: If fourth digit on HOD is 2, 3, 6, or 7, go to paragraph 8–153. FAIL: Location of fault: left outboard launcher, wiring from left outboard launcher to left outboard MRTU Type II, left outboard MRTU Type II. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–153 SIGNAL NAME: P1M2 MSL AUTO PILOT POWER (ACY) P1M2 A/P PWR OK (ACZ) MEMORY LOCATION: 001412 MEMORY DATA BIT(S): 17 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Specifies auto pilot power is above minimum value (+18 VDC). REMARKS: From ECSP to RHE. PASS: If first digit on HOD is 4, 5, 6, or 7, go to paragraph 8–154. FAIL: Location of fault: replace left outboard launcher (TM 9–1425–475–30–2). 8–154 SIGNAL NAME: P1M2 MSL AUTO PILOT POWER (ACY) P1M2 A/P PWR OK (ACZ) MEMORY LOCATION: 001670 MEMORY DATA BIT(S): 17 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Specifies auto pilot power is above minimum value (+18 VDC). REMARKS: From launcher through left outboard MRTU Type II to FCC. PASS: If first digit on HOD is 4, 5, 6, or 7, refer to failure symptom index and next failure symptom paragraph. FAIL: Location of fault: left outboard launcher, wiring from left outboard launcher to left outboard MRTU Type II, left outboard MRTU Type II. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).

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