TM 1–1520–238–T–2 Change 7 2–97 Table 2–1. Master Failure Symptom Index (cont) Failure Symptom MOC Reference IHADSLOS INVALID APPEARS ON CPG HDU (CPG FCP: BRSIT IHADSS SWITCH SET TO IHADSS) TM 9–1270–221–23 IHADSS IHADSLOS INVALID DOES NOT APPEAR ON CPG HDU (CPG HELMET RH OR LH IR SENSORS COVERED) TM 9–1270–221–23 IHADSS IHADSLOS INVALID DOES NOT APPEAR ON PILOT HDU (PILOT HELMET RH OR LH IR SENSORS COVERED) TM 9–1270–221–23 IHADSS IHADSS CIRCUIT BREAKER (CB1) DOES NOT STAY CLOSED (PILOT ELEC PWR PANEL: BATT/EXT PWR SWITCH SET TO EXT PWR) TM 1–1520–238–T–6 CIRCUIT PROTECTION SYSTEM (AC ESSENTIAL BUS 1 – CPG STATION) IHADSS CIRCUIT BREAKER DOES NOT STAY CLOSED TM 9–1270–221–23 IHADSS INS ATT? MESSAGE DISPLAYED TM 1–1520–238–T–3 TM 11–1520–238–23–2 EMBEDDED GPS–INERTIAL (ADD) INS HDG? MESSAGE DISPLAYED TM 1–1520–238–T–3 TM 11–1520–238–23–2 EMBEDDED GPS–INERTIALB (ADD) INS NO–GO MESSAGE DISPLAYED TM 1–1520–238–T–3 TM 11–1520–238–23–2 EMBEDDED GPS–INERTIAL (ADD) INS VEL? MESSAGE DISPLAYED TM 1–1520–238–T–3 TM 11–1520–238–23–2 EMBEDDED GPS–INERTIAL (ADD) INSUFF KEYS APPEARS ON GPS STATUS PAGE (ADD) TM 11–1520–238–23–2 EMBEDDED GPS–INERTIAL (ADD) INTERCOM SYSTEM (DSCRM ON MODE) TONE – IS NOT HEARD IN HEADSET (ADN) TM 11–1520–238–23–2 RADAR WARNING SYSTEM AN/APR–39(V)1 (ADN) INTERNAL VIBRATOR IN CPG BAROMETRIC ALTIMETER IS NOT HEARD (EXTERNAL ELECTRICAL POWER APPLIED) TM 1–1520–238–T–5 FLIGHT INSTRUMENTS INTERNAL VIBRATOR IN PILOT BAROMETRIC ALTIMETER IS NOT HEARD (EXTERNAL ELECTRICAL POWER APPLIED) TM 1–1520–238–T–5 FLIGHT INSTRUMENTS INVALID CONFIGURATION MESSAGE DISPLAYED TM 11–1520–238–23–2 DOPPLER NAVIGATION SYSTEM (DNS) AN/ASN–137 (ADD)