TM 1-1520-238-10 2-84 Change 8 Table 2-5. CPG Caution/Warning Light Segments – continued Word Segment Illumination Parameter or Fault Color ROCKET AMBER Failed system. ELEC SYS FAIL RED Complete dc electrical system failure. The battery is powering the dc emergency bus. BUCS ON AMBER Backup control system is activated in at least one control axis. MISSILE AMBER Failed system. TADS AMBER Failed system. PRI HYD AMBER Primary system hydraulic oil pressure is below 1250 psi. MAN STAB AMBER Automatic operation of the stabilator control unit has failed, or manual control has been selected. TEMP INT AMBER Intermediate gearbox temperature is above 274 – 294 F (135 – 145 C). UTIL HYD AMBER Utility system hydraulic oil pressure is below 1250 psi. ENG ANTI ICE AMBER An engine anti-ice subsystem has failed. VOICE CIPHER AMBER KY-58 is operating. CHIPS MAIN XMSN AMBER Main transmission chip detector has detected metal fragments. FUEL LOW FWD AMBER When light comes on, about 260 to 300 pounds of fuel remain in the forward fuel cell at cruise attitude. FUEL LOW AFT AMBER When light comes on, about 210 to 270 pounds of fuel remain in the aft fuel cell at cruise attitude. ASE AMBER One or more components of the automatic stabilization equipment is inoperative, or one or more of the SAS channels is inoperative or has been selected OFF. ENG 2 AMBER One or a combination of the following: engine oil pressure low, engine oil filter in bypass, engine chips, engine fuel filter bypass, engine fuel pressure low, nose gearbox chips, nose gearbox oil pressure low, nose gearbox oil temperature high. MAIN XMSN 2 AMBER One or a combination of the following: transmission oil temperature high, oil pressure low. PRI MUX AMBER The selected bus controller has malfunctioned and the other bus controller has assumed control of the multiplex bus. Light will extinguish when the operating bus controller is selected with the MUX switch on the CPG fire control panel. VIB GRBX AMBER Intermediate or tail rotor gearbox vibration level is excessive. TEMP TR AMBER Tail rotor gearbox temperature is above 274 – 294 F (135 – 145 C).