P1M1 MSL SKR POWER CONTROL (ACY) P1M1 SKR PWR OK (ACZ)

TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
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TM 1–1520–238–T–3 Change 4 8–33 8–100 SIGNAL NAME: P1M1 MSL SKR POWER CONTROL (ACY) P1M1 SKR PWR OK (ACZ) MEMORY LOCATION: 001274 MEMORY DATA BIT(S): 13 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Controls application of seeker power. REMARKS: From RHE to ECSP. PASS: If third digit on HOD is 1, 3, 5, or 7, go to paragraph 8–101. FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–101 SIGNAL NAME: P1M1 MSL SKR POWER CONTROL (ACY) P1M1 SKR PWR OK (ACZ) MEMORY LOCATION: 001710 MEMORY DATA BIT(S): 13 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Controls application of seeker power. REMARKS: From launcher through left outboard MRTU Type II to FCC. PASS: If third digit on HOD is 1, 3, 5, or 7, go to paragraph 8–102. 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). 8–102 SIGNAL NAME: P1M1 MSL SKR POWER MEMORY LOCATION: 001413 MEMORY DATA BIT(S): 12 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates status of seeker power (+28 VDC). REMARKS: From ECSP to RHE. PASS: If third digit on HOD is 2, 3, 6, or 7, go to paragraph 8–103. FAIL: Location of fault: RHE, wiring from RHE to left outboard launcher, left outboard launcher. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–103 SIGNAL NAME: P1M1 MSL SEEKER POWER (ACY) P1M1 SKR PWR OK (ACZ) MEMORY LOCATION: 001671 MEMORY DATA BIT(S): 12 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates status of seeker power (+28 VDC). REMARKS: From launcher through left outboard MRTU Type II to FCC. PASS: If third digit on HOD is 2, 3, 6, or 7, go to paragraph 8–106. 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). 8–104 SIGNAL NAME: P1M1 CCM ACTIVATE CMD MEMORY LOCATION: 001274 MEMORY DATA BIT(S): 14 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Commands missile seeker to enter counter countermeasure (CCM) mode. REMARKS: From RHE to ECSP. PASS: If second digit on HOD is 4, 5, 6, or 7, go to paragraph 8–107. FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).

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