P4M3 MSL CORRELATE

TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
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TM 1–1520–238–T–3 8–264 8–1002 SIGNAL NAME: P4M3 MSL CORRELATE MEMORY LOCATION: 002046 MEMORY DATA BIT(S): 16 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates laser has detected a laser beam whose laser code agrees with internal stored code. REMARKS: From launcher through right outboard MRTU Type II to FCC. PASS: If second digit on HOD is 1, 3, 5, or 7, go to paragraph 8–1003. FAIL: Location of fault: right outboard launcher, wiring from right outboard launcher to right outboard MRTU Type II, right outboard MRTU Type II. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–1003 SIGNAL NAME: P4M3 MSL TRACK MEMORY LOCATION: 001430 MEMORY DATA BIT(S): 15 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates seeker has entered track mode. The laser seeker can enter track mode whenever a proper laser beam is detected in seeker FOV for any mode except cage. REMARKS: From ECSP to RHE. PASS: If second digit on HOD is 2, 3, 6, or 7, go to paragraph 8–1004. FAIL: Location of fault: replace right outboard launcher (TM 9–1425–475–30–2). 8–1004 SIGNAL NAME: P4M3 MSL TRACK MEMORY LOCATION: 002046 MEMORY DATA BIT(S): 15 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates seeker has entered track mode. The laser seeker can enter track mode whenever a proper laser beam is detected in seeker FOV for any mode except cage. REMARKS: From launcher through right outboard MRTU Type II to FCC. PASS: If second digit on HOD is 2, 3, 6, or 7, go to paragraph 8–1153. FAIL: Location of fault: right outboard launcher, wiring from right outboard launcher to right outboard MRTU Type II, right outboard MRTU Type II. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–1005 SIGNAL NAME: P4M3 MSL SKR CAGE CMD MEMORY LOCATION: 001303 MEMORY DATA BIT(S): 19 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Commands missile to enter cage mode. REMARKS: From RHE to ECSP. PASS: If first digit on HOD is 0, 2, 4, or 6, go to paragraph 8–1006. 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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