TM 1-1520-238-23 1-252 Change 2 1.75. APU OPERATING INSTRUCTIONS – USING EXTERNAL POWER – continued u. On the pilot caution/warning panel check that the following segments illuminate: PRI HYD PSI UTIL HYD PSI ADS OIL PSI ACC PUMP OIL PSI NOSE GRBX 1 OIL PSI MAIN XMSN 1 OIL PSI MAIN XMSN 2 OIL PSI NOSE GRBX 2 OIL PSI ENG 1 OIL PSI ENG 2 GEN 1 GEN 2 FUEL PSI ENG 1 SHAFT DRIVEN COMP PNVS CANOPY (if open) EXT PWR TADS ENG 1 ANTI-ICE ENG 2 ANTI-ICE v. Enter CPG station (para 1.56). Observe all safety precautions. w. On the CPG caution/warning panel check that the following segments illuminate: PRI HYD UTIL HYD MAIN XMSN 1 MAIN XMSN 2 ENG 1 ENG 2 ADS GO TO NEXT PAGE M04-1868-16 CPG STATION M04-1868-15 M04-1868-17