TM 1–1520–238–T–2 2–170 Change 5 Table 2–1. Master Failure Symptom Index (cont) Failure Symptom MOC Reference SCU 1 NO-GO LH CATWALK APPEARS ON HOD (AAC) TM 1–1520–238–T–7 STABILATOR SCU 2 NO-GO LH CATWALK APPEARS ON HOD (AAC) TM 1–1520–238–T–7 STABILATOR SDCC (ONLY) FAILS TO ZEROIZE (ADD) TM 11–1520–238–23–2 DOPPLER NAVIGATION SYSTEM (DNS) AN/ASN–137 (ADD) SDCC (ONLY) UNCOMMANDED ZEROIZE (ADD) TM 11–1520–238–23–2 DOPPLER NAVIGATION SYSTEM (DNS) AN/ASN–137 (ADD) SELF TEST INDICATOR IS NOT LIGHTED (PILOT FIRE CONTROL PANEL: MASTER SWITCH SET TO SAFE) TM 1–1520–238–T–6 PILOT CAUTION AND WARNING SYSTEM SERVOCYLINDER DOES NOT TRAVEL FULL STROKE (EXTERNAL PRIMARY HYDRAULIC POWER APPLIED) TM 1–1520–238–T–5 PRIMARY HYDRAULIC SYSTEM SEU NO–GO RH FAB APPEARS ON HOD TM 9–1270–221–23 IHADSS SHAFT DRIVEN COMP INDICATOR IS LIGHTED (ENGINE 1 OPERATING) TM 1–1520–238–T–5 PRESSURIZED AIR SYSTEM SHAFT DRIVEN COMP INDICATOR IS NOT LIGHTED (FOR APPROXIMATELY 60 SECONDS AFTER APU START) TM 1–1520–238–T–5 PRESSURIZED AIR SYSTEM SHAFT DRIVEN COMP INDICATOR REMAINS LIGHTED (FOR LONGER THAN APPROXIMATELY 60 SECONDS AFTER APU START) TM 1–1520–238–T–5 PRESSURIZED AIR SYSTEM SHORT BEEP IS HEARD IN HEADSET (CIPHONY PANEL: MODE SWITCH SET TO CIPHER, PILOT PTT SWITCH AND RADIO TRANSMITTER FOOT SWITCH PRESSED AND HELD) TM 11–1520–238–23–2 TSEC/KY–28 COMMUNICATIONS SECURITY EQUIPMENT SHORT BEEP IS NOT HEARD IN HEADSET AT BEGINNING OF TRANSMISSION (PILOT RADIO TRANSMIT FOOT SWITCH DEPRESSED AND HELD) TM 11–1520–238–23–2 TSEC/KY–28 COMMUNICATIONS SECURITY EQUIPMENT SIDETONE AUDIO NOT HEARD IN HEADSET (PILOT CYCLIC STICK: RADIO PUSH TO TALK OR RADIO TRANSMITTER FOOT SWITCH PRESSED) TM 11–1520–238–23–2 TSEC/KY–28 COMMUNICATIONS SECURITY EQUIPMENT