P3M2 MSL AUTO PILOT POWER CONTROL (ACY)

P3M2 MSL SKR INPUT SLAVE (ACY) P3M2 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 8–178 Change 4 8–665 SIGNAL NAME: P3M2 MSL AUTO PILOT POWER CONTROL (ACY) P3M2 AUTOPLT PWR (ACZ) MEMORY LOCATION: 001330 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 8–666. FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–666 SIGNAL NAME: P3M2 MSL AUTO PILOT POWER CONTROL (ACY) P3M2 AUTOPLT PWR (ACZ) MEMORY LOCATION: 002021 MEMORY DATA BIT(S): 9 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Controls application of auto pilot power to missile. REMARKS: From launcher through right inboard MRTU Type II to FCC. PASS: If fourth digit on HOD is 2, 3, 6, or 7, go to paragraph 8–667. FAIL: Location of fault: right inboard launcher, wiring from right inboard launcher to right inboard MRTU Type II, right inboard MRTU Type II. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–667 SIGNAL NAME: P3M2 MSL AUTO PILOT POWER (ACY) P3M2 A/P PWR OK (ACZ) MEMORY LOCATION: 001424 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 8–668. FAIL: Location of fault: replace right inboard launcher (TM 9–1425–475–30–2). 8–668 SIGNAL NAME: P3M2 MSL AUTO PILOT POWER (ACY) P3M2 A/P PWR OK (ACZ) MEMORY LOCATION: 002021 MEMORY DATA BIT(S): 17 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Specifies auto pilot power is above minimum value (+18 VDC). REMARKS: From launcher through right inboard 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: right inboard launcher, wiring from right inboard launcher to right inboard MRTU Type II, right inboard MRTU Type II. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).

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